Malicious PDF — malware analysis report

Static analysis result for SHA-256 2629cad3a7e1c3c5…

MALICIOUS

PDF

74.8 KB Created: 2021-03-01 09:18:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 110c7e237dcbc353d54fc76d7964bce2 SHA-1: d0444df48b02208fc6d2591e750081a447afd6f3 SHA-256: 2629cad3a7e1c3c524c427af2e3d11b094ddea7346fcae85e1fa26eb2a135998
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to job searching. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wb?keyword=public%20administration%20jobs%20houston%20texas PDF link annotation
    • http://matroskin.space/diamond_archery_infinite_edge_pro_compound_bow_package_5-70_lbs._right_handt4xm4.pdfIn PDF document text
    • http://mastera-saydinga.ru/android_studio_hide_title_bar12ym2.pdfIn PDF document text
    • http://podarokinsta24.online/buduzogesokarjsaq.pdfIn PDF document text
    • http://itagreen.fun/58925599293esth.pdfIn PDF document text
    • http://verifiedbadges-form.com/xopupedidogipogimatodie3ner.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/first_grade_math_fluency_practice.pdfIn PDF document text
    • http://sosunimepewe.22web.org/formal_dresses_near_me_short.pdfIn PDF document text
    • http://ketousa.site/what_is_a_paragraph_proof20qk9.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/4142194191.pdfIn PDF document text
    • http://alcozerox.com/grim_soul_dark_fantasy_survival_hack_iosyoof4.pdfIn PDF document text
    • http://originalhallyu.com/xegamag2e3bj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gulavofi.epizy.com/cbec_gst_rate_finder_app.pdfIn PDF document text
    • http://repujatadaw.rf.gd/milodawokixine.pdfIn PDF document text
    • http://bufoxujofepir.rf.gd/atlas_copco_compressor_oil_data_sheet.pdfIn PDF document text
    • http://fewuzefar.rf.gd/11171335618.pdfIn PDF document text
    • http://folilef.rf.gd/xubuzaxuju.pdfIn PDF document text
    • http://junenizexi.epizy.com/crosswords_with_friends_answers_9_29_18.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_off0000e6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B1 5464 bytes
SHA-256: fb74338b227e279666fe4e6f0e08760a89a38c3aece447d5c651e7877527b232
font_01_sfnt_off0000f91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91E 10956 bytes
SHA-256: ae5b82fe3b4a1bb6501eec2e85ed17a78fba69579ed0abdea466e207e2d9251b

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