Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff0f7c1c7c6e705…

MALICIOUS

PDF

79.4 KB Created: 2021-04-29 07:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 41993374106e925fdc9207848f504dfa SHA-1: 8c2e0eec7b2875b3bda4d85d19b6902dae30f2c1 SHA-256: cff0f7c1c7c6e705095f6fbf2bfcacf1115bb5f448928235b8535ed6676e6be6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9991

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://bologen.ru/strik?utm_term=samsung+a10e+price+in+india PDF link annotation
    • http://okrasote.info/38580003240q1on2.pdfIn PDF document text
    • https://cdn.sqhk.co/rirelolut/jbx1bhh/rusty_lake_the_white_door_day_7.pdfIn PDF document text
    • http://deluwotitawugo.iblogger.org/crockpot_cooking_chicken_thighs.pdfIn PDF document text
    • https://cdn.sqhk.co/xorazasuno/p9diiSv/vofixuxisirodiredikuti.pdfIn PDF document text
    • http://wide-take.top/blackstar_id_core_40_dimensions0s5x0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472484/normal_5fec3f20ab56b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_60568071d8cc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424400/normal_5fdd3b6e9d2ea.pdfIn PDF document text
    • http://uspeh.icu/juluzfet9d.pdfIn PDF document text
    • https://xidoteruredogon.weebly.com/uploads/1/3/1/4/131454367/3d933deb7.pdfIn PDF document text
    • https://vejupurujiku.weebly.com/uploads/1/3/1/6/131606174/1349197.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/hhqLQji/motiw.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/chaeEhi/busbar_in_substation.pdfIn PDF document text
    • http://maxafutolo.iblogger.org/bodybuilding_anatomy_nick_evans.pdfIn PDF document text
    • https://cdn.sqhk.co/bitulore/gfDgjWz/fear_the_walking_dead_season_6_episode_16.pdfIn PDF document text
    • http://bilkan.fun/sawugegugoximerubizogirebo9vop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_605816683bd36.pdfIn PDF document text
    • http://gelivebun.22web.org/83216223367.pdfIn PDF document text
    • http://getcreditcheck.info/suzuki_250_quadrunner_oil_capacityhbv5x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasomozonomevam.rf.gd/64265072619.pdfIn PDF document text
    • http://nigagemi.rf.gd/ap_grama_sachivalayam_question_paper_2020.pdfIn PDF document text
    • http://nurejorafu.epizy.com/zuvesasisifiroxuvezetek.pdfIn PDF document text
    • http://gagivipupine.epizy.com/46903398084.pdfIn PDF document text
    • http://wevedikelu.epizy.com/dyson_dc18_slim_parts_diagram.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_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 5660 bytes
SHA-256: e575c809e4a3d178c35129cdfbe828e9eb0c53a1e19319a6eee623781fac88c0
font_01_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 10972 bytes
SHA-256: 467784b0cc4a70fc3ae76cb51269490ba39c918ad779073393692fc32fd4ff31

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