Malicious PDF — malware analysis report

Static analysis result for SHA-256 da06a027f28e3e21…

MALICIOUS

PDF

84.8 KB Created: 2021-04-04 10:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e9d55e91aa3dd548165e956c49fc26fd SHA-1: e8d70ff78f86bbb7d0afed5a816889d763ab9611 SHA-256: da06a027f28e3e2187728bdc8b031c3fffa73d739b3a51d1d5ba226fc4cd4516
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=can+i+get+a+covid+antibody+test+in+california PDF link annotation
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/zogot_mobigukazegun_tokari.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://koxijarekaze.weebly.com/uploads/1/3/5/3/135326688/fupew_vivad_bevogokemunig.pdfIn PDF document text
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/vodogajerefazam-savebaxot.pdfIn PDF document text
    • https://cdn.sqhk.co/takabalal/jlhhaKX/slots_of_vegas_free_chip_2020.pdfIn PDF document text
    • http://frasqen.online/pagokujov1a2e0.pdfIn PDF document text
    • http://arenda-comp.space/time_of_contempt_chapter_5_summaryukwvx.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/YqLOf4H/team_fortress_2_tower_defense.pdfIn PDF document text
    • http://tradebot.space/kakimezegora897qe.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/fifiijb/find_my_mobile_phone_location_free_uk.pdfIn PDF document text
    • https://gojamomer.weebly.com/uploads/1/3/2/8/132815882/2646453.pdfIn PDF document text
    • https://befapoge.weebly.com/uploads/1/3/1/6/131637854/e6b213b.pdfIn PDF document text
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/4370634.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/darimon_rabamoronosozek_foradiza_lemavojalu.pdfIn PDF document text
    • http://morpeoplelife.ru/describe_the_radical_republican_plan_for_reconstruction0dbg8.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
    • https://uploads.strikinglycdn.com/files/755ec6ee-7af0-481d-aa99-4bc878d8c5a0/nudilipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df683380-2991-4600-9221-04d3ad5f3994/56296217575.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_off0000fff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF4 5300 bytes
SHA-256: 00838e763f7796f2057b4bea77aabb133e653b7a6e9047eb588592ec54b27445
font_01_sfnt_off00011214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11214 11056 bytes
SHA-256: 10231101faaecdbf9adca021bf6e53c6f6bc06dd95a75b09498b73c1ee6fbeb9
font_02_sfnt_off000137a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176