Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a6b1049f943481…

MALICIOUS

PDF

82.8 KB Created: 2021-02-28 17:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 727fd6f553f6281a61901ab4ec4fa1a1 SHA-1: 9c07a847e106c203c003a8c78fcc64e8e918aaa6 SHA-256: 76a6b1049f943481c3ca55170419806db5b7ad8259ff8ccba2242dd047716b3e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of an advance-fee scam, indicated by heuristics flagging lottery/parcel lure language. It contains a large number of external links, many pointing to PDF files, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://druttle.ru/wix?keyword=neal+dow+house
    • https://cdn.sqhk.co/faroziwe/7gfhCIp/98812471418.pdf
    • https://kebopudej.weebly.com/uploads/1/3/5/2/135298692/4878513.pdf
    • https://cdn-cms.f-static.net/uploads/4413373/normal_5fe785e750e38.pdf
    • https://static.s123-cdn-static.com/uploads/4367000/normal_5fec2edabf563.pdf
    • https://cdn.sqhk.co/zoluxoni/ghhjggy/xisekabetesipajol.pdf
    • http://lasleymarkt.ru/alcatel_lucent_manual_8001fm7x3.pdf
    • https://static.s123-cdn-static.com/uploads/4422622/normal_5fcb7367ad3ea.pdf
    • http://domainlimax.xyz/allworx_6x12_manualx860s.pdf
    • https://jigudisite.weebly.com/uploads/1/3/4/6/134603970/dbb07f848d1b.pdf
    • https://cdn.sqhk.co/biposuba/jeuDs9F/magic_rush_heroes_tier_list_2019.pdf
    • https://cdn.sqhk.co/besiwowegin/gjhagfE/best_savings_tracker_app_for_iphone.pdf
    • https://cdn.sqhk.co/mazonixun/mCXieTC/farm_heroes_saga_grass_seed_levels.pdf
    • https://cdn-cms.f-static.net/uploads/4370280/normal_6013b0eebe0a1.pdf
    • http://granitmetrospecstroy.ru/sec_financial_reporting_manualki86u.pdf
    • https://cdn.sqhk.co/kovajivika/bhfMifS/create_a_list_in_excel_cell.pdf
    • https://cdn.sqhk.co/fusozuwalas/mggjfvV/farixukijafovusuj.pdf
    • https://static.s123-cdn-static.com/uploads/4465123/normal_5fe2146cd1135.pdf
    • http://igcopyrightclient.com/d_d_5th_edition_character_sheet_editable3olc2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001096e.bin
e64e5c0de4f581881cbaf589dbb1567bcc317e69186deafa3bf0449a6bfefde3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 4880 bytes
font_01_sfnt_off00011a17.bin
1d98dd18d9579cc1fdc072662bd0ec2c4ad89010a52f64f4a25a28fc70254f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A17 10564 bytes

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