Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f9440fe251b882…

MALICIOUS

PDF

87.5 KB Created: 2021-03-02 18:04:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 86b43cd56090dcc01b8b174be1e12947 SHA-1: d74fd261a3219be253ba9c0b6044997a20e26cf2 SHA-256: 06f9440fe251b882814c95ec700760272b1bf90712c85eed7f8fe1926ba26883
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9997

Heuristics 5

  • 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 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://lozipotod.ru/123?utm_term=how+much+do+mckinsey+consultants+make+in+india PDF link annotation
    • http://lesifipi.22web.org/conair_hair_clipper_reviews.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/aplikasi_bri_mobile_untuk_hp_androideorge.pdfIn PDF document text
    • http://qqkaxes.xyz/esc_heart_failure_guidelines_201808lsw.pdfIn PDF document text
    • http://interior.estate/24801055908omhn5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491936/normal_5fdba96db8162.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/do_electric_dog_fences_work_for_german_shepherds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453890/normal_6026f3a17f01a.pdfIn PDF document text
    • http://gravkamen.ru/oxidation_of_ketones_chemguideritvy.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/taxonomia_de_bloom_verbos_para_objetivos_especificos.pdfIn PDF document text
    • http://cocobeautybar.ca/photoshop_cs6_effect_tutorialaieam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_603a616de63bb.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/43225922148.pdfIn PDF document text
    • http://mediaverifiedbadge.com/equus_peter_shaffermjev4.pdfIn PDF document text
    • http://ranking-se.com/57849209588ru2c6.pdfIn PDF document text
    • http://termo-nord.tech/how_much_do_car_mechanics_earn2cpft.pdfIn PDF document text
    • http://inostrana.com/pressed_for_words_apkbs87s.pdfIn PDF document text
    • http://cupe1.ru/50088452988xh1av.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500911/normal_60037e161caeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zelafofavelak.epizy.com/bloodchild_and_other_stories_online.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A3 5304 bytes
SHA-256: f975ed3373e144b09c92ed222035d83f2fd7be21f4d8faeb57adced68509dfc0
font_01_sfnt_off00010a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9F 15476 bytes
SHA-256: b504a1ef47c48c54d78ebc4b855c5561a335f56292b1fd20feb2563b43227a2d
font_02_sfnt_off00013aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEF 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8