Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea956ac5fc428b8a…

MALICIOUS

PDF

74.2 KB Created: 2021-03-30 13:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 60d3c55f690b30dd94e8d9a0513dfe1b SHA-1: b0542a1855b8e2bc62ae030b1e01632a8386e4fa SHA-256: ea956ac5fc428b8ad0705150e6d8659158a2c11b992d51a4820079c7a8f3aecf
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://nipisod.ru/wix?keyword=buy+here+pay+here+dealers+in+chambersburg+pa PDF link annotation
    • https://wawodedirikib.weebly.com/uploads/1/3/5/3/135348651/mibuvamuzobuj-fubobeponewozif-dawakez.pdfIn PDF document text
    • https://zasetumodoroba.weebly.com/uploads/1/3/4/6/134692621/fapag.pdfIn PDF document text
    • https://finubakexa.weebly.com/uploads/1/3/1/3/131383318/3443611.pdfIn PDF document text
    • https://nugurevupag.weebly.com/uploads/1/3/4/1/134108952/kepega.pdfIn PDF document text
    • http://freshnatur.fun/j_cole_apparently_piano_sheet_musiczhl27.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/how_much_water_do_i_put_in_my_presto_pressure_cannera45um.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/7c97a1b11eeb8.pdfIn PDF document text
    • https://malafusid.weebly.com/uploads/1/3/2/8/132815748/dojawevu_vonapibap.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/pirobunalakivur.pdfIn PDF document text
    • https://nikupotipemami.weebly.com/uploads/1/3/0/9/130969226/gukaxujazatezi.pdfIn PDF document text
    • http://genusttwsr.fun/720970996yx73x.pdfIn PDF document text
    • http://fuckfrsky.com/rohnson_r_980_manual9s5v2.pdfIn PDF document text
    • https://badexakabenal.weebly.com/uploads/1/3/4/0/134017850/87cf7eb.pdfIn PDF document text
    • http://hotsales-com.xyz/bonipakobativbafhv.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/sRhdcig/flashlight_online_for_chromebook.pdfIn PDF document text
    • http://geesecam.com/sabuxudinoxefux4f8w.pdfIn PDF document text
    • https://jatomotubaw.weebly.com/uploads/1/3/0/7/130739460/bdcdbac708b1298.pdfIn PDF document text
    • https://ragixadimeruwu.weebly.com/uploads/1/3/4/8/134897014/0b23687.pdfIn PDF document text
    • https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/2997944.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdfIn PDF document text
    • https://gewavidabu.weebly.com/uploads/1/3/0/7/130775927/5631033.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/gejfiap/wild_frontier_vital_prey_diet.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/hi8i7jc/debesitumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 5780 bytes
SHA-256: 08cfc737130487d8a4cc0c697662a2119b21db519914365b8b29c6805f58ed2f
font_01_sfnt_off0000f547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF547 11196 bytes
SHA-256: 7c6c9cb17002ea2f59a862b4ab89b5bded9cc017785c252b94a1c4fa44450af1