Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fc47ff72d0afea…

MALICIOUS

PDF

72.0 KB Created: 2021-09-16 09:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 18417133e457be50887d7fae228faf08 SHA-1: 48d3fd44a2d42da3c40d03719956af21015c7163 SHA-256: 80fc47ff72d0afeaae363bb64dc0f94da8e30086d68add3e63274d9a3f1825a0
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt the user to call a phone number, a common tactic in tech-support scams or callback phishing. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=super+mario+classic+gba+rom PDF link annotation
    • http://nhac.ditimchanly.org/Images_upload/files/pewibamedipituzezivodasa.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613756f934c75---piduti.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/duzusewezikukevodowa.pdfIn PDF document text
    • http://klhl.com/userfiles/file/wetifizi.pdfIn PDF document text
    • http://futboltotal.net/images/files/84284514320.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/a9f21990d57be044798c61f1b6c1de63/lasewimigagofux.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/14146869311.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/42444728394.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/zudupufeza.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/85928216504.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090922125129.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/belusagufizikifav.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210906_4754C63758A3C005.pdfIn PDF document text
    • http://herve-coiffure.ci/files/18391893546.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210909190428.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/78043354154.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/tawexixupuzipowa.pdfIn PDF document text
    • http://imi.vc/upload/files/68076313281.pdfIn PDF document text
    • http://showpelec.com/data/file/20210916_012314_524.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/sabazafazorisimutafaxoxe.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/4429376310.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/41354275472.pdfIn PDF document text
    • https://avflash.nl/upload/files/nanowebizixisazo.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/tedure.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161364ec7f3983---mapiwobijuligizita.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_off0000b92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB92D 15704 bytes
SHA-256: 0de0e9285d1ccdeff61d350fde6d4c511097a9f330232e9298ee78b6954aa39a
font_01_sfnt_off0000e154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 10832 bytes
SHA-256: 3f9b9cc6157c464e38411de25107061d883ed03e0e1ffea60ccee7b3bd5485f6

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