Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2a0d802a5051bf…

MALICIOUS

PDF

84.2 KB Created: 2021-07-14 05:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ac9699b33d9651e277c4c9b2174aad94 SHA-1: d83414c2c8f01afda701397426ea6f9ff41f7bb1 SHA-256: 7c2a0d802a5051bf14a9d77773bb41e0b9db928f70d56223aad075e28df7348f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains, suggesting an intent to redirect users to malicious content or phishing pages. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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 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://pixomot.ru/uplcv?utm_term=separation+agreement+template+nz+free PDF link annotation
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/05e189755cbea1efff0e803b98ea3363/48559711637.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/nabemim.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/aaa9ec1c18961a667417eb46679a712a/tizurojiwelibenakutuwa.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/74112690328.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0ca997cb7---gefubosaxewagisazi.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/53474967026.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2ab68bf9c---vipukonamakisuzaxuwosu.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609858c949bad---76663763323.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210704002143_3lg954.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080ee441c77d---73323160378.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce031366fa4---lusewire.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1b2f589009---papomuwofijilesaxulidek.pdfIn PDF document text
    • http://614move.com/clients/4890/File/32111149525.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/81849439010.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/bewonisofu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/g2shjd8drqq9in2ck36862bfk6/ziwofitezij.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/20006021220.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/d3eb2b56ac9d702fff3aa1e96c3a4528/budiserebiwat.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/toruvizewi.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee37accca937d466c83b4b6c8d809502/pixorenobuvemuf.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/934ff09dba846a382373a1322efd617c/xogubu.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/667200da0d803eb43ad2be4435e85d72/wigikiwakutufamafunogataz.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rgo0hedlljbf840bcgab92pce4/9153423206.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/31435693609.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/781615598.pdfIn PDF document text
    • 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_off0000e83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 16564 bytes
SHA-256: a2cf54c8d3789948bb10e62c5ec521ce1a8210250b682c09f2dc9454aefa6d64
font_01_sfnt_off0001130e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130E 10668 bytes
SHA-256: 77043073235e4f898de4c2b4f551e68cc4e54c96cdb06cf6e56df12729f3c078
font_02_sfnt_off00012b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1