Malicious PDF — malware analysis report

Static analysis result for SHA-256 617787c2a7f42432…

MALICIOUS

PDF

81.2 KB Created: 2020-11-14 00:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 01b0b7ac8db66007f852184a1dd23f62 SHA-1: 35e30e141ad90b3bd89eb692b87f55a28919df16 SHA-256: 617787c2a7f424328df636a019a4a8dfd092eb02666472a49ee7c5ada31f4795
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Peoplesoft payroll reports'. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely for phishing or to serve a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://cctraff.ru/aws?utm_term=peoplesoft+payroll+reports In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485152/normal_5fa9acad50b83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_5fa374816f713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_5f93fcc7d2135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_5f985aa29efa1.pdfIn PDF document text
    • https://luwigemo.weebly.com/uploads/1/3/4/5/134597726/5749233.pdfIn PDF document text
    • https://zavadogo.weebly.com/uploads/1/3/4/3/134325895/xeruvinadoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f871dbcac06e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f33d9e-7565-4659-a5c4-790c869ebe24/xunebeligunomino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d49a2bc-ae6b-4046-9f09-56ea21644fb1/reading_and_writing_decimals.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/pdf_betty_azar_basic_english_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fbaba5-733f-4cc3-a732-3c524ab1ec47/28421732289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a3280d5-eb73-481f-81a0-3c4fd05a0217/95136819664.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/xesomuxoluweximub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e687c4-379a-410e-b891-3bb96c03cadf/critical_communication_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec268abe-c53a-4aef-9dc3-ee36df15536f/84911974291.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_off0001016a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 4996 bytes
SHA-256: 553fd7b18447aa3bdaff3409906c1330f9f88b201afe0d7f87841a14ada1f26e
font_01_sfnt_off00011280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11280 10972 bytes
SHA-256: c4d353a91499a7011d2ec4b942de25c076d9a3bfe5e20f85f38f302743d082fb

Open this report in the interactive analyzer, or submit your own file for analysis.