Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d76680502532ef…

MALICIOUS

PDF

77.2 KB Created: 2021-03-08 22:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 34044d0ce9f793bde84d9113697e5a20 SHA-1: 13360f187faf3f8dbb441208e07227b8de0f9d9c SHA-256: 57d76680502532ef73f1548f2983765f2386801fa983c94a135341057e6d1b9d
244 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 a machine learning classifier. It contains a significant number of embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body appears to be malformed or truncated, but the presence of a link farm suggests an attempt to lure users to external sites.

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 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.
  • 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://crophysi.ru/aws?utm_term=roland+td-3+electronic+drum+module+and+pad+set In PDF document text
    • http://selizixid.iblogger.org/73075883227.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/gadevebaketemolijazazupa.pdfIn PDF document text
    • https://dosukasexu.weebly.com/uploads/1/3/1/6/131637789/dikebutezimusukedi.pdfIn PDF document text
    • https://faloxumotib.weebly.com/uploads/1/3/4/6/134646793/52c2f1.pdfIn PDF document text
    • https://lunisaga.weebly.com/uploads/1/3/5/3/135302545/lagezafilitipopejiso.pdfIn PDF document text
    • http://kaxavetaxudu.mywebcommunity.org/romeo_and_juliet_act_3_scene_1_exam_question.pdfIn PDF document text
    • https://fexagoresex.weebly.com/uploads/1/3/4/3/134337575/geguvo-lamakodujasitex.pdfIn PDF document text
    • http://rojenugilin.22web.org/vajonovitevinisozi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a763e7d-6b3e-402a-a24a-a508a934a99f.filesusr.com/ugd/3e0cb9_e855fb743fa14903803359b4c8d4eb6b.pdf?index=trueIn PDF document text
    • http://tereralubo.epizy.com/how_to_reset_dsc_security_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6109d9-0db0-4086-83c4-4a51885f860b/bewojixatomuriwazunotik.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/35275995855.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_13991277eefd49f49dc0548d2710f29d.pdf?index=trueIn PDF document text
    • http://sosujogi.epizy.com/72684398573.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/market_share_reporter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3beca91f-fee4-429a-99d1-edeb42b71adc/craftsman_mini_tiller_cultivator_carburetor.pdfIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_4fc83f66a8d64bf3bb6041bf38c3d8cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divexikav/biwunudopafojamizuf.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/84503825331.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_off0000f068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF068 5424 bytes
SHA-256: bad3922bcf8ad8320fc33fd15a2b3d83cce26a6ae3cf478c3822941ea06c7faf
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 10776 bytes
SHA-256: f49924d8f6a87be3269575faab2b22666adef74585654f7a4689e4cef9ba374b

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