Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf1af0c6eb826ad…

MALICIOUS

PDF

93.0 KB Created: 2021-05-08 14:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 415ef68b4be9946fdaab9daebf62241c SHA-1: 77e636e91db1d49ba1943a5ce1a4695d361d1c45 SHA-256: 9bf1af0c6eb826ad4f28f6627e0d3466a4a70551812782f969c4004e099ebdaf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious domain ('maypoin.ru') that is likely used for phishing or malware delivery. ClamAV detection and ML classification strongly indicate malicious intent. The presence of embedded URLs and a link farm heuristic further supports a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=d-link+dsl-2750u+user+manual+en+francais PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402267/normal_60069162c643f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482228/normal_5ff2bbe7bd63e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_6034288310dc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469119/normal_5fd7f3a1b0a6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5fd1bdb12197a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481676/normal_600f986a384cf.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
    • https://s3.amazonaws.com/fowikorejodi/24675013201.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/45632841737.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/tomelewafifobetom.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/autodock_vina_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/console_application_windows_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/modal_verbs_examples_mustnt.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/varazof.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/rifidujedaxekogemezawi.pdfIn PDF document text
    • https://97e6e6c8-040d-427c-ad66-6ef02350ae38.filesusr.com/ugd/9c523c_7dfedb6ddf8644e3875867704f0fce01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/android_appium_scroll_to_element.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_d5e3cfb6369b4923ac01830d758563e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/proper_bench_press_form_female.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/makisonifimugizimijis.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/67612049651.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/78043077026.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_off000122ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BA 1596 bytes
SHA-256: 160c980d51cae34ae5c602e97090f70e65221942a7f92126d2d36edcfb765824
font_01_sfnt_off00012ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB7 5740 bytes
SHA-256: d217411f62050c6f025a9d44595af3c5b7fc498ce68d499c2ecbe4526a1e88b7
font_02_sfnt_off00013e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E45 11132 bytes
SHA-256: 2b703d3e02318744988fc40e92f2b19c73c2982abc017189f08e8bf22728660c

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