Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c9c6f382b33272…

MALICIOUS

PDF

79.2 KB Created: 2021-05-22 17:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02ed35ae56d4dbb0f28d6dc8acd58a5d SHA-1: fff050e6ffc4e8503e6c583000c9013397ef132a SHA-256: 30c9c6f382b3327275cd9e263c197903946bd8859bc8223166c5c8d442ed7d97
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. While the document body is heavily corrupted, the presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://static.s123-cdn-static.com/uploads/4389570/normal_5fe12564cde1e.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_6014da8da8947.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/9e1167a8bdabc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383698/normal_5fec6c960c949.pdfIn PDF document text
    • https://bovefunovowuto.weebly.com/uploads/1/3/0/8/130873908/9095369.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367294/normal_6000594bacf3f.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/laxok-kozerekopogobi.pdfIn PDF document text
    • https://gepepokomireke.weebly.com/uploads/1/3/4/8/134892048/2595545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_6047bdf02e010.pdfIn PDF document text
    • https://nixabuvibowigev.weebly.com/uploads/1/3/4/3/134308208/9528254.pdfIn PDF document text
    • https://zebomutob.weebly.com/uploads/1/3/2/6/132696512/momikepasemel-kamedap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494669/normal_5ffa831737825.pdfIn PDF document text
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/baruwiwewo_ximojane_mezikuwezar.pdfIn PDF document text
    • https://badetujunomut.weebly.com/uploads/1/3/1/8/131857650/miranutelovepage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fc8fcf076379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_6063d9ba7ded0.pdfIn PDF document text
    • https://morogixifidogaj.weebly.com/uploads/1/3/4/4/134497599/wonovuxalani.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/56c3ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390069/normal_5fccc5f7de4f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/G1IkLG9TFNM/wb?keyword=nancy%20drew%20games%20online%20free%20download%20full%20version%20macPDF link annotation
    • https://s3.amazonaws.com/xisakazelelinim/61708495218.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/xinuzebasugidi.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_off0000f726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF726 5564 bytes
SHA-256: 1307ce3cd0e9473c4e2c3eef28e983fd7fd4d29ad08d745ff9e4554889a6ff8a
font_01_sfnt_off00010a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A26 10876 bytes
SHA-256: d7820e0f68951f9da31e3afca331abd8029462bfa7a9d17e34b6cc827c16bd1b

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