Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b818e71ff0dde6…

MALICIOUS

PDF

69.7 KB Created: 2021-03-01 19:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0d11f0d2214f5d35a6366a6357d91c66 SHA-1: ea82bc3dcd1da24bdc629b59b1c2ec7f4d708828 SHA-256: 32b818e71ff0dde6b72a67d387adb3d067c4f6cabad70e023a866820f124dbd8
206 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains numerous external links, many hosted on disposable domains, characteristic of a link farm or SEO poisoning attack. The heuristic 'SE_CALLBACK_LURE' suggests a potential phishing or scam pretext, although the document body is heavily obfuscated and does not provide clear textual lures. The presence of embedded URLs and the overall structure strongly indicate an attempt to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/aws?utm_term=a+christmas+carol+jim+carrey+online+free PDF link annotation
    • https://xesuxikoju.weebly.com/uploads/1/3/4/0/134095833/lamalovotiderid.pdfIn PDF document text
    • https://retagavit.weebly.com/uploads/1/3/4/3/134363188/laduger_pusorujuxowa_nuzijizuju.pdfIn PDF document text
    • https://xesupolapiban.weebly.com/uploads/1/3/4/5/134586318/9698130.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/nedakabizafatexop.pdfIn PDF document text
    • http://doxisolawasusig.66ghz.com/47150205252.pdfIn PDF document text
    • http://freshnatur.fun/super_mario_land_gameboy_for_saleqa76g.pdfIn PDF document text
    • https://pinobuni.weebly.com/uploads/1/3/0/9/130969003/jofodomepedenek.pdfIn PDF document text
    • https://jimamejovegevag.weebly.com/uploads/1/3/4/5/134593921/d880a27ca2d9e.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/mupesaxetos_xazosadowolewal.pdfIn PDF document text
    • https://merokiniperoj.weebly.com/uploads/1/3/4/6/134691049/lofuwokazeves.pdfIn PDF document text
    • https://polupamenutotuk.weebly.com/uploads/1/3/5/3/135334754/vegavopunok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazipinabobon.epizy.com/ave_maria_bach_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/solamitigede.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/deep_fitted_sheets_double_size.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/12295207932.pdfIn PDF document text
    • http://lagiwafumize.rf.gd/how_to_report_fraudulent_social_security_calls.pdfIn PDF document text
    • http://kogavajel.epizy.com/letters_to_a_young_contrarian.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_off0000d003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD003 5288 bytes
SHA-256: 3d4b5e7c186bf025c803a7c128cea7b6fa2ddcc9d34aa6798e7ed3d08743782f
font_01_sfnt_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 11636 bytes
SHA-256: 8492d3851f6e2b0e5969810c97dee2af82567e2017863fe201c33371f78c14e0

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