Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b1ad18d6f67647…

MALICIOUS

PDF

85.7 KB Created: 2021-10-06 07:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 97357bfa63765be3ebbbc97a02d1dbb4 SHA-1: ec221a3afd9bbb6229999bac539931470c396c83 SHA-256: 17b1ad18d6f676472615b1176d76d72a0856dd0ca1230b67399db35e3e1cd5e3
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and is flagged as a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://huntic.ru/uplcv?utm_term=documents+required+for+incorporation+of+company PDF link annotation
    • http://nsk-nalogov.net/upload/files/xagufodupegijexix.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/legexilejof.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/83362055178.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/44128266780.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/fesizaguxamibidegaf.pdfIn PDF document text
    • http://fpole.ru/sadm_files/lasomeko.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/14311118659.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/babajaju.pdfIn PDF document text
    • http://sov.tranovice.cz/webpagebuilder/ckfinder/userfiles/files/69902234286.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/18655605697.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1615a8dae80046---94365089598.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/sapeganaporopujoxuxow.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/podukanobibozavuwaxiba.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/74120969784.pdfIn PDF document text
    • http://pate4me.com/userfiles/file/dudalazileketex.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e2d80e90f8b1764fda0612c761457d86/remopixomodiligebubo.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/dunowotofikobudomuda.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/sasidugubi.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/26614319652.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/71735268885.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/xurunajibalatujiloso.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/tegigow.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/49042876446.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_off0000e5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CA 19044 bytes
SHA-256: c4bbfda20ec4ad72b7fb942d6aac440f93a92ee8afc22a3abf8916196bc63ffb
font_01_sfnt_off0001175f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F76 11096 bytes
SHA-256: a4eabb3d7fc5f8196ed0fd6f90c1fc68c28e5c09945adb2341ce7a3059d28832