Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ca70bc3c346d36…

MALICIOUS

PDF

124.4 KB Created: 2021-06-15 13:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7a12645168ca673269380dc09227ff02 SHA-1: e80c280ea33a693190041e5c0110c021a94d2332 SHA-256: d6ca70bc3c346d3640bcd6474c5a95dc0dd0d8bd2b5ad1f5e1c5861a7c51effa
164 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing or malicious document, including a large number of external links and ML classification flagging it as malicious. The presence of urgency language further supports a phishing lure. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://coretry.ru/pbw?utm_term=cod+special+ops+2 PDF link annotation
    • https://wipiwabe.weebly.com/uploads/1/3/4/4/134438476/deberegiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500429/normal_5ff3ad688c80f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485705/normal_6011e5aaa4f3c.pdfIn PDF document text
    • https://putuxukive.weebly.com/uploads/1/3/1/3/131379249/2539749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472198/normal_6049227c0720a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488141/normal_602985ae6eefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_602f7a4a9c107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_6022bc2217d3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446264/normal_605b7cc3e33f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_602c30cb216e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_6013c4dd9ac5e.pdfIn PDF document text
    • https://xokojitijuxup.weebly.com/uploads/1/3/4/3/134362284/6816465.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/aaa99c30-165b-42a9-8d7f-5720683a07b3/bad_things_happen_in_threes_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b04f665-7f96-4d91-986c-9baa7357ad95/bukewepitubebup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4949f4d-7f59-4c6e-b09e-ecdc6002af72/the_dark_tower_movie_vs_book_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ccc7b56-8e6b-4f56-873c-850edf86c876/patricia_benner_novice_to_expert_1982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97899351-b80e-4e32-b606-42c2c65938ca/whats_your_dog_breed_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/285c9437-9f2e-4ca4-aa5f-d65c216ef2fd/82006184647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/345e3966-6e05-42fa-86cb-ce1676d73042/7457929738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed06bc98-8b8e-4d0e-a119-cca94c10085d/guvefirarabebum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b33c513-59f7-447f-aedc-a9888f8648eb/directv_ultimate_package_channel_lineup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af42d70b-a1a6-467f-8c95-761306d197f8/sonic_burger_nutrition_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522f888b-29e2-4b15-b11a-f9a42683c9bc/pugaxobisodewaluwu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F89 8344 bytes
SHA-256: ccda56510bd13ca651699308dbd8ae19e37c30e51f188edf5f9d1515f8de99d0
font_01_sfnt_off0001aba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABA8 5008 bytes
SHA-256: 53471eac8aef299c8940a30c812b386c5a30507b92ce3374d79588e49c0021f1
font_02_sfnt_off0001bcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCBE 11360 bytes
SHA-256: 0ec5948dcbfccef194d7381fee81ff230aa42dde4addef0e8093d3448c8ba1ac