Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7bae32945068b7…

MALICIOUS

PDF

80.5 KB Created: 2021-03-27 20:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 70096abcd75b5de30efd70db2d7b52fc SHA-1: 88e2e5237fb0670f02873fe66595aacb81e5ed21 SHA-256: 6d7bae32945068b7b5e60a9e924380675ff3c8bb3d02ba5067d05ddb90afa478
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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=cot+sheets+fitted PDF link annotation
    • http://rte-ita.fun/80428765238ckevy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_601d0f5aa48ca.pdfIn PDF document text
    • https://molobaguzali.weebly.com/uploads/1/3/0/7/130739923/595092.pdfIn PDF document text
    • https://nerutaraludu.weebly.com/uploads/1/3/4/6/134672403/raporav-nadasotozo-sufedu-pexosatamuwipa.pdfIn PDF document text
    • https://rupevegix.weebly.com/uploads/1/3/4/8/134887155/5f6518dfbba02.pdfIn PDF document text
    • https://zatuduxe.weebly.com/uploads/1/3/4/5/134595584/1718810.pdfIn PDF document text
    • http://idealsit.space/como_hacer_un_bosquejo_de_una_funcionn9imw.pdfIn PDF document text
    • https://rolewexuvuviwu.weebly.com/uploads/1/3/4/7/134742390/6700875.pdfIn PDF document text
    • http://forecast.bet/xuvegojegatejepojejoxg18rr.pdfIn PDF document text
    • http://vsedlyatebya.xyz/easiest_way_to_learn_english_grammarnfoln.pdfIn PDF document text
    • https://kuwomodelinero.weebly.com/uploads/1/3/0/7/130776449/2f56eca43206.pdfIn PDF document text
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/f4653a19f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_6034460970e57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc85e48e40b0.pdfIn PDF document text
    • https://jedagafigi.weebly.com/uploads/1/3/1/4/131438055/xeteki.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/kikomekepuguwer-jigitutexa.pdfIn PDF document text
    • https://setitafonoje.weebly.com/uploads/1/3/1/8/131856277/gutimabawalavoz-komamexuv.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/repegalagukixagagunudiloss1ge.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/2408734.pdfIn PDF document text
    • https://bibixofepo.weebly.com/uploads/1/3/4/2/134235383/7856791.pdfIn PDF document text
    • https://tunawirivam.weebly.com/uploads/1/3/1/4/131437064/b1cfc42b597.pdfIn PDF document text
    • https://gininigexaviw.weebly.com/uploads/1/3/5/3/135350692/3915669.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://s3.amazonaws.com/jemisajoda/lotuxivifo.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/tilugivomalunodisuno.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/lower_third_template_kinemaster.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/composition_writing_guide.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_off0000f39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39F 4360 bytes
SHA-256: abc325c2dce3fc8cd65cde1aec6c7ca31eac5bcbf2b805fae6a216fb1a1df25e
font_01_sfnt_off0001027f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 10328 bytes
SHA-256: 82a1bfce524341293f6bb20a15e9ace9c64d36a9a153daa51856edeb9cf87896
font_02_sfnt_off000125df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e