Malicious PDF — malware analysis report

Static analysis result for SHA-256 db508f66d7369ef8…

MALICIOUS

PDF

82.7 KB Created: 2021-03-29 05:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d02a0fa2a40beb54bfba7286d24454e SHA-1: 92a3d37c25ee9c519a391b2c3875f6d502042621 SHA-256: db508f66d7369ef8789f5d309b43282c96a6adfec2f8f6db121db82f6d799e73
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of an advance-fee scam. The document contains numerous external links, with a primary suspicious URL pointing to 'pelibifir.ru'. Although no scripts were explicitly extracted, the presence of multiple PDF link farm heuristics suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=can+you+use+any+bags+with+the+foodsaver
    • https://kiteginizi.weebly.com/uploads/1/3/1/8/131871518/6378073.pdf
    • https://kasitawudak.weebly.com/uploads/1/3/1/3/131380619/7195199.pdf
    • https://cdn-cms.f-static.net/uploads/4417226/normal_60538282c4b12.pdf
    • https://sipobazi.weebly.com/uploads/1/3/4/4/134494275/2adf2041.pdf
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/tizewof.pdf
    • https://xiwupegolowiba.weebly.com/uploads/1/3/1/6/131606046/efa2819bb0.pdf
    • https://cdn-cms.f-static.net/uploads/4488804/normal_604e94e7a8eb3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_018e384020864b72bb03728b89c5ff9c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c9607a2f-7082-48b2-b3bc-424797ab870c/html_and_css_design_and_build_websites_drive.pdf
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_926ab2a946284e9e99eb71263748e4ad.pdf?index=true
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_28bca04fc3284f3aabcb9b258b4e4ae8.pdf?index=true
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_ae3cdaa271cd45c4bb23c503ee3032b3.pdf?index=true
    • https://db6a684c-bd73-4a61-997a-17040cc1d896.filesusr.com/ugd/bbbb20_d256f939c7eb4f2b9f86c5b4e2155b46.pdf?index=true
    • https://uploads.strikinglycdn.com/files/af3eaf88-9a19-4308-8b7f-70ff23b23004/thirty_one_canada_return_policy.pdf
    • https://uploads.strikinglycdn.com/files/0ff36f78-5c26-409f-aa04-0f1d85890360/gupekusexetizidoxipofaru.pdf
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_19dace6bd32e457a9503e861a99a6164.pdf?index=true
    • https://uploads.strikinglycdn.com/files/36bfd3f4-2227-4041-8195-7dc007de1ae4/31371852288.pdf
    • https://uploads.strikinglycdn.com/files/2eb5eb06-b8ba-4561-ac8d-90decb187eda/melapodarexaguzo.pdf
    • https://uploads.strikinglycdn.com/files/e7db6095-7435-4acc-9edb-240bcc0e28c4/10113970576.pdf
    • https://uploads.strikinglycdn.com/files/b4d8f583-b05f-471c-9843-7bd934b311b4/turn_the_ship_around_leia_knows_where_luke_is_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/8ad19342-c763-47ec-a4e7-a4d21579438f/boganodepazupivowupiwum.pdf
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_2e92e7125493475abad4f811afb13289.pdf?index=true
    • https://uploads.strikinglycdn.com/files/69498de0-25e8-462c-bad1-c9433aab4364/how_to_train_employees_to_have_difficult_conversations.pdf
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_7c42ff5699584b3790974182e544b665.pdf?index=true
    • https://d926c97b-7f3b-4ec8-a52a-318bcb589338.filesusr.com/ugd/120f26_628cb4e9eeea4edcb753fb72fee82b75.pdf?index=true
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_b8075106127a466b93ad388b04f07ec7.pdf?index=true
    • 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_off00010277.bin
17b70d94e57e8c841624808f305b691bbf3ac5754b970c667bb5e5aeeba1ec8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 5436 bytes
font_01_sfnt_off0001150e.bin
7fc3df78067bea6f1a66ea69d88a5a9867f62be1a052c2e64090ad1517a0b08f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1150E 11180 bytes