Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de2cce2556f971f…

MALICIOUS

PDF

134.9 KB Created: 2021-07-08 07:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f8707b6209743fb3e9cbbf4a179ed8d4 SHA-1: 4912345bc55ca72c0aad1732272af596e630b8c2 SHA-256: 0de2cce2556f971f3e2c8882b03279bc15edc91f58722e48e749b3929f50fe95
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to potentially compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/4dc0381a9b81c1a66d64a4b63d8951c4/75444059983.pdf In PDF document text
    • http://anadarkogomezfamily.com/clients/7/76/76920377ef4e0cfe2c6e77079a05cbd4/File/jutokiwuvorusosarodixe.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08c95d620b---nejikezerelukepuxikedone.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/6fb3mvir2o93cv3kpoc458ft71/34018060005.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2d8c87369281e85cedb88189e2dc5fda/93166616225.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/9emvn591sc302d184nrvkr9meg/fepusezedafulera.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/8cd03b2e0a18c2d964e2af04f5f08647/13084192716.pdfIn PDF document text
    • http://dental1970.com/clients/5/52/52cfbc2c58cc98a1938bca6351e90795/File/67616040887.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/9537b92c2ba6838fd9d8e59634b04ea2/jufibej.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749705cacb2---99900859398.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/kupukinufupezagupudux.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/47106051094.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/nudagegawimedufu.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/8bc69iptaf39s3hu3ug3iqt5d7/zesatotagizoxarujup.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/labajeburikuketamejex.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/wizipurabemeba.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/042bc2fea84a7b29c1e4b1196113e1cf/tebamipatotufiwuno.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/17584341643.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/kasolazewenolawiwoxuziwud.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160843f4321bee---xigipezelukatajezirugi.pdfIn PDF document text
    • http://hudsonohiohighschoolclassof1980.net/clients/7/7d/7d4b1ad73701457990394555a34ab01f/File/70304138806.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/dewadabikolutub.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/tjnafblalbi57gvpr816o3r4en/51677442499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=dealing+with+guilt+and+anxietyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B10B 10544 bytes
SHA-256: eff3e6ac1a3e39d65d9ed0c4c43377f4eb09250c929f0dad15d2e328b452f594
font_01_sfnt_off0001c8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0E3 17324 bytes
SHA-256: b665149d29858f856fe98c6998c24f1bb6c58ec21318adea4b370f7694fa893c

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