Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b0d5413b4b2078…

MALICIOUS

PDF

65.0 KB Created: 2021-02-07 07:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7ba404510c2d01c8a05a0e9ac328bcb2 SHA-1: b86f3913a489cfee9348ee0287c1f52572a58b6b SHA-256: a2b0d5413b4b2078e82e51075545c1694f283ba73d361541cb77109ecd6db91f
204 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to suspicious domains, with at least one identified as a known malicious redirector. The presence of a callback lure suggests a phishing or scam attempt, aiming to trick the user into interacting with the malicious links or potentially calling a fraudulent number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=canterbury%20college%20prep%20uniform In PDF document text
    • http://jijimaxugixu.22web.org/jimiku.pdfIn PDF document text
    • http://lg-copyrightforms.com/hamilton_soundtrack_zipd6lfv.pdfIn PDF document text
    • http://cosmostil.top/20859210861lj2sa.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/xanomaxidubexip675ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_600e5a48c6154.pdfIn PDF document text
    • http://nutigunejome.22web.org/gubbi_mele_brahmastra_full_movie_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474448/normal_5fe097ab31a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_5fd273f5cea90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452373/normal_5ff2a1eec7adc.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/fjcuOgf/exponential_idle_supremacy_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5fdc09a35ac29.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/iihP6ie/nasasojidibaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_601e774dad486.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5fff6adc56796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403556/normal_6007b325b6b35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugoribomepi.rf.gd/ccap_colorado_jefferson_county_income_guidelines.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/60989430188.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC372 5304 bytes
SHA-256: c9ab60b952d722c5a6652da9350e025cf7129d3a6095837417a3bdfefd17b2e6
font_01_sfnt_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 9992 bytes
SHA-256: 054b69fdc723c964a5defb194c28c65125989698c3d7c7043e2b3c87b9c04876

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