Malicious PDF — malware analysis report

Static analysis result for SHA-256 affe24bde85cb226…

MALICIOUS

PDF

75.2 KB Created: 2021-03-17 18:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5525cf2ceb61c4c256f6b54928b3e0d6 SHA-1: edba68ae500577bb25e28bb061a646f78aa04da9 SHA-256: affe24bde85cb22677a48b4cf63fdcae238f465177e82110c88b513098676ff0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to writing a CV in Afrikaans, which is likely a pretext to drive traffic to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://kuzutuzo.ru/strik?utm_term=how+to+write+a+cv+in+afrikaans PDF link annotation
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/pefiwadi_tokuduwesejub_fumog_tawokolisomot.pdfIn PDF document text
    • http://podjem2.club/does_t_mobile_offer_caller_idvgsko.pdfIn PDF document text
    • http://trackcreditscore.info/pakirrmlf1.pdfIn PDF document text
    • http://show-visitor.xyz/lewijojamelekosov96dd.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/percy_jackson_part_1_full_movie_download_in_hindi_480p5bg06.pdfIn PDF document text
    • http://glasshookahcatering.com/energie_cinC3A9tique_1ere_s_exercices_corrigC3A9s87w20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470028/normal_5feea30a0c3a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482403/normal_60035702655b0.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/is_cloud_reliablem8y7n.pdfIn PDF document text
    • http://gitilapen.66ghz.com/pasulesiwepobigiguxi.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/sikefopitibikugoswm2p0.pdfIn PDF document text
    • https://wuporebepumi.weebly.com/uploads/1/3/5/9/135981990/tobakimuvubosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_602b035244cfe.pdfIn PDF document text
    • http://instapresent.site/vagijuwodojfag3u.pdfIn PDF document text
    • http://sexaxagorotire.iblogger.org/keurig_2.0_cleaning_pod_holder.pdfIn PDF document text
    • https://jalebipozufi.weebly.com/uploads/1/3/5/3/135320073/b1f2e.pdfIn PDF document text
    • https://josozigigararu.weebly.com/uploads/1/3/2/6/132681886/9c2bb1e8cac.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/78345435784mwg7j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezazemana.epizy.com/42779266636.pdfIn PDF document text
    • http://dukeleba.epizy.com/breaking_bad_spanish_subtitles.pdfIn PDF document text
    • http://tedijafubivot.epizy.com/90565332228.pdfIn PDF document text
    • http://pegesij.rf.gd/86740590064.pdfIn PDF document text
    • http://kaxinezapur.epizy.com/68000877144.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_off0000e89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 5020 bytes
SHA-256: 12fa0430cc3fd8e7652611a6b28c770b486099affbc099d8a856b04d5f5ec13f
font_01_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 11016 bytes
SHA-256: 647b5e4450a3916dafe18bb0abc648956675c97741af00a62e389f3c83adbf30

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