Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c801020f0fadea…

MALICIOUS

PDF

159.4 KB Created: 2021-02-22 02:14:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 770f715ec0e856bd05900c1e350d662f SHA-1: d192ce26ad26ccaf21065a763795fa5d6a0bef12 SHA-256: 94c801020f0fadeadeaa193255a689ca1608cba87d75a52cfd5afbeed9e586a7
166 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a payment redirection lure. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the link farm and potential phishing activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://maypoin.ru/123?utm_term=simcity+4+deluxe+walkthrough PDF link annotation
    • http://gisaxisiburu.66ghz.com/rozakejakutabakitoluvedib.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/QhfX0he/hero_wars_tier_list_may_2020.pdfIn PDF document text
    • http://xigotazuwal.iblogger.org/difejadek.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/Rigjggj/20048585857.pdfIn PDF document text
    • http://genokoti.iblogger.org/onn_tv_code_for_suddenlink.pdfIn PDF document text
    • http://gonugotez.22web.org/17726282661.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/Msiighh/jixaduvotuweresavefenifud.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaku/ghwgdji/42045092820.pdfIn PDF document text
    • http://dovulup.iblogger.org/45398768027.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/jjbB4ha/ice_hockey_english_league.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wapowidomuf.epizy.com/afflicted_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/zutizo.pdfIn PDF document text
    • http://jelasojeb.rf.gd/63212366909.pdfIn PDF document text
    • http://borarujedumamut.epizy.com/81329141642.pdfIn PDF document text
    • http://gilokokivaw.epizy.com/visual_basic_.net_for_dummies_download.pdfIn PDF document text
    • http://tebexuvizo.rf.gd/invisible_inc_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/53657481690.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/marur.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/44145929671.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/96182434819.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_off000236c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x236C6 5692 bytes
SHA-256: 658d7b77609ae486ddc09323388342110c310f6aa834c132ffd01390abbdd984
font_01_sfnt_off00024a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24A25 11148 bytes
SHA-256: ae3fc4c2ab300bd52da2f963e94b227ae585ae69063848ee51b1572cf48bb490

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