Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03a01d94c89e1f7…

MALICIOUS

PDF

90.0 KB Created: 2021-06-28 23:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ebac11c8b521638d49707767b01544e7 SHA-1: ca3410525642c4d5bd9fc59ef964986585fe692c SHA-256: e03a01d94c89e1f72d6b82f63059e68ddfeabdcd9df200f3ed1c5681babfdc19
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://strahovka66.ru/userfiles/file/rozuf.pdf In PDF document text
    • http://allprintusa.com/admin/images/file/15659495968.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/96394294d77e6791974f140cdaf110ca/71121633745.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5dc287fbd---fotupamuxezitamovi.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/782b64e5fb08cae17d33b1a12304a728/vakemeg.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/jibobaxedibukumedudirasex.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/22717246153.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/nisexo.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0af6269d46---kadozewob.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/ec044a0f5e47306ef161f43437c7834e/58344245386.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/7066381617.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/61fc25ca3b6f4bcd82b44a6ac35fa1d8/kutokumefiz.pdfIn PDF document text
    • https://htddienstverlening.nl/userfiles/file/85485639671.pdfIn PDF document text
    • https://vpntraffic.com/upload/files/giluvap.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97be609204---namidudidekigono.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/383075baa53175bcf06db18535356b5c/xosatimekopamugafokugi.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/34581862157.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/dogojenegade.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ra3a8mvr301qfmf7neobarm0b2/79390338861.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c387ca6c59c---1999765434.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083e46d9525f---52439678448.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/34972193116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=numerology+and+the+divine+triangle+pdf+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE594 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAB 11120 bytes
SHA-256: 93c67e769af99a03e570297e65ef1773772ce12ef7565d2628c51cb9074b0587
font_02_sfnt_off0001173b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173B 17288 bytes
SHA-256: db5594909e89fd037b2989e77f255279540b49baf287aa2ff0ab0174bda9e1dc
font_03_sfnt_off000144c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C1 16132 bytes
SHA-256: 43ac470fcea589ff610178d7ee8b4eca3d7ebca5e1a90d9dbe30350601643f36

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