Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff586d9f1c5c86d…

MALICIOUS

PDF

87.1 KB Created: 2021-04-04 02:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1b0343ed1b83b8558797a337896b7160 SHA-1: adc65a86a4642c545f796944b4cd164a06bf62e9 SHA-256: bff586d9f1c5c86ded2639b723ebd51e7b30f44a3294c9a85087bb80cff6eccd
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'reliability centered maintenance ppt' in a URI suggests a lure to entice users to click on these links, likely leading to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://nipisod.ru/123?utm_term=reliability+centered+maintenance+ppt PDF link annotation
    • http://ceter.xyz/what_causes_a_dryer_to_keep_shutting_off7zsv4.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/tekemitumodanuw.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/lumifinuxojaxe_senizedipisazix_bativi.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/fawujezavefegujezisen.pdfIn PDF document text
    • http://woodbonus.net/rabixutidikisw9525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445735/normal_60163186bb669.pdfIn PDF document text
    • http://kuliwegi.sportsontheweb.net/zafidito.pdfIn PDF document text
    • http://greyfruit.space/yasin_suresi_mp3_indir_download_dinle9rozc.pdfIn PDF document text
    • https://xefegirabiveg.weebly.com/uploads/1/3/0/9/130969499/f5695b5556.pdfIn PDF document text
    • http://7evenrp.ru/sociology_optional_for_upsc_syllabus8988p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_60524cd8edf66.pdfIn PDF document text
    • http://crysety.xyz/47651911209h7icm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_5fd70a24922f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446781/normal_601f623837007.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wovubixagoxix.rf.gd/14147792685.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/el_camino_del_heroe.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/77864574154.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/bunanawopafola.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/blue_eyes_technology_abstract.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/78673119626.pdfIn PDF document text
    • http://tisawefe.rf.gd/92885589724.pdfIn PDF document text
    • http://zejuruk.rf.gd/what_major_event_occurred_in_1877.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/grim_soul_dark_fantasy_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_off00010f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F20 1572 bytes
SHA-256: e88443b14e86e4d13991448cb855da87db39bf6dffcfcd92cd5b657ce7a18dc3
font_01_sfnt_off00011724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11724 5288 bytes
SHA-256: af119836a4c296dcf6eb9244b0021c8990557ff12af69dcb12995a92ff3ff843
font_02_sfnt_off00012910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12910 10888 bytes
SHA-256: 19dc6ffd4f25f6f6356f62ddd6ef9e615f83c45babc8f511827e3b3c0bb2ee4b

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