Malicious PDF — malware analysis report

Static analysis result for SHA-256 938ab234fd989dc6…

MALICIOUS

PDF

78.1 KB Created: 2021-04-06 01:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0337ade0f70026634008743f7ca8a135 SHA-1: 03e12c8e3309d29017247dc899fc8e9805de8903 SHA-256: 938ab234fd989dc6ce6e8f298a4d5117ec65c138265bed8723fe4b5b35c29fbd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. ClamAV and ML classifiers indicate malicious intent, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cdn.sqhk.co/giripiponi/idhib0o/fafafetexeropejixi.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5fd80728a8773.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/6hbAohg/street_fighter_4_apk_obb_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fd7472adf624.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454040/normal_5ff21e02bf259.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/cHNA2lg/best_remixes_on_spotify.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/bpGDggh/35044407510.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/bjiEghc/48732172772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_6062c54bb5ee0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426941/normal_60135e8c23202.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/n4t4wXRn-MA/wb?keyword=requirements%20for%20solo%20parent%20id%20renewalPDF link annotation
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_015ebc20d03d4f8687410b3b16910549.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/game_of_thrones_piano_sheet_music_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/bunalazasepivo.pdfIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_5c952383052947b3bd0af9976f8e420c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/febopa/66529842026.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/55946193752.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/astha_bangla_natok_song.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/a_level_physics_alternating_current.pdfIn PDF document text
    • https://de8ad7ab-6cf7-4105-a9f9-ff813146ba5f.filesusr.com/ugd/84a5c6_e0a6e08c5d7b4448b92b98cde67b301b.pdf?index=trueIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_06a4de3c0a1842499024922af9cc4c51.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/bike_helmet_size_guide_uk.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_2bdcdf63589f4b0f9cb82dd4d838286e.pdf?index=trueIn 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_off0000e59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59F 5292 bytes
SHA-256: 7f075c231a94493fe222e308a212f065f3102f14f62d6795e389476a0794b291
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 10492 bytes
SHA-256: 5f4c03d0cf0a3e3a644f53746cb0c24c9a80ca6164b26c280d195074f17b69d1
font_02_sfnt_off00011b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B43 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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