Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cbb7ff3b09f193…

MALICIOUS

PDF

90.9 KB Created: 2021-03-14 16:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 88b3345c57c14cb01d41300f7c792345 SHA-1: 279b9610a2d34ef6bf7efc3f617fb2520dcd681a SHA-256: d8cbb7ff3b09f1935e216f5d7e277fb78ddf95dc02e44b8ccd78d13f6d14afcf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to an 'oil production report' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/123?utm_term=eia+weekly+oil+production+report PDF link annotation
    • http://vusejulene.iblogger.org/birchington_primary_school_ofsted_report.pdfIn PDF document text
    • http://lamorebeduzakoj.22web.org/acronis_2016_free.pdfIn PDF document text
    • http://kefitetapirep.22web.org/texibiwefefese.pdfIn PDF document text
    • http://artdebug.site/53488215814l3q6v.pdfIn PDF document text
    • http://makamar.tech/38773538092ad7o5.pdfIn PDF document text
    • http://hurricane1.space/workpro_quantum_9000_manualkqyfy.pdfIn PDF document text
    • http://topcreditmonitoring.info/77120096187xzkox.pdfIn PDF document text
    • http://igcopyrightclient.com/fitazemaxozuzije42n44.pdfIn PDF document text
    • http://piwifeg.22web.org/feint_crossword_answer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_600c84afc7777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465694/normal_60305343eabac.pdfIn PDF document text
    • http://afterdealer.pro/19508526247otf3c.pdfIn PDF document text
    • http://thestablestl.com/why_cant_i_scan_from_my_brother_printerojeg4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456378/normal_601b3d9721104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magelul.epizy.com/71974974415.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/irs_form_for_backdoor_roth_ira.pdfIn PDF document text
    • http://resipivoxopir.rf.gd/1134822358.pdfIn PDF document text
    • http://situfixumuvefom.rf.gd/skmei_s-shock_digital_black_dial_mens_watch.pdfIn PDF document text
    • http://kigetivizaru.epizy.com/metformin_for_pcos_in_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/beginners_guide_to_running.pdfIn PDF document text
    • http://risogida.rf.gd/remojuxutejagesexim.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/how_to_get_snap_on_torque_wrench_calibrated.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_off00011c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 3084 bytes
SHA-256: f24846e024915e51fd8f90e2c528666278dbc3f9e9a5595f388da4e795c26caa
font_01_sfnt_off00012729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12729 5104 bytes
SHA-256: ab3d489686b1edffd7cf7732fe5908c305be0a3388b9197bccf86c8540ca0b8d
font_02_sfnt_off000138b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B7 10708 bytes
SHA-256: 4cc6a99cc4227d9fb1dca5984ca262ceaf795230537b126459ffd54d150c5169

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