Malicious PDF — malware analysis report

Static analysis result for SHA-256 72964bb5a4e2d6d1…

MALICIOUS

PDF

94.6 KB Created: 2021-03-18 10:14:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 925e3363fa7490617e54058622787c0b SHA-1: 05023d6b5e502b0a5eb37782c76b318ad4a95f7c SHA-256: 72964bb5a4e2d6d1d1f861353a8d152665ef7894e8c827a755429be282dbdb4b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous external links, many of which point to disposable hosting. The document's content is presented as 'Sewing machine manuals' to deceive users into clicking these links, which likely lead to further malicious content or phishing sites. The presence of many external links and the nature of the hosting suggest an attempt to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=sewing+machine+manuals PDF link annotation
    • https://rogejizerabori.weebly.com/uploads/1/3/4/7/134763318/gavore.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/satipatthana_sutta_discourses_goenkamqv04.pdfIn PDF document text
    • https://wisolowiguwo.weebly.com/uploads/1/3/4/6/134630140/viruzalasiti-luraribezo-tenaketegu.pdfIn PDF document text
    • http://bigchance.pw/tactical_battle_simulator_onlinecawu7.pdfIn PDF document text
    • http://gezilobogobig.22web.org/best_android_phones_under_15000_smartprix.pdfIn PDF document text
    • https://mibinataxufix.weebly.com/uploads/1/3/1/4/131438539/942985.pdfIn PDF document text
    • https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/lajevapivoja-wokuko-fijozuxe.pdfIn PDF document text
    • http://tonerinkstore.com/7331167370418n4m.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/are_snapper_lawn_mowers_goodmngfn.pdfIn PDF document text
    • https://nuvefozilif.weebly.com/uploads/1/3/4/7/134733792/rolisez.pdfIn PDF document text
    • http://vkysnaya-eda.site/a_midsummer_nights_dream_sparknotes_act_4jc1pa.pdfIn PDF document text
    • http://trynutra.shop/gipawakolijovikojulagamoaul8e.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/8c951beeee.pdfIn PDF document text
    • https://lekusimije.weebly.com/uploads/1/3/1/3/131383821/lajokimamib_selavo.pdfIn PDF document text
    • https://sowimarigakuni.weebly.com/uploads/1/3/4/7/134705136/fixasebidimajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotuziput.epizy.com/dnd_5e_players_handbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/53520283871.pdfIn PDF document text
    • http://pilivizelonula.epizy.com/48446853491.pdfIn PDF document text
    • http://tagekef.rf.gd/22109393576.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/gta_3_cheat_codes_file.pdfIn PDF document text
    • http://tobobuximalusu.epizy.com/86621074314.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001350e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350E 5312 bytes
SHA-256: 2ef125a5c8ef35bcc51d342e4310bc83ae10013c1a82cc6abf8269c01be32bb8
font_01_sfnt_off0001470f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1470F 11336 bytes
SHA-256: 84eb0b8bc2ecb084689d8827ef6e99fd486a387bf8027b4d39959426ee123bce