Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3d950b4667a1c6…

MALICIOUS

PDF

69.7 KB Created: 2021-04-03 12:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: db0002d31453db92385c677150368bd9 SHA-1: 3405f180a83bdab2f31933ee42619b8a1e00ceb1 SHA-256: 0f3d950b4667a1c67724b50d79f01236090b55e444b60e100ce49bb37b806592
214 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as search results, with one prominent link leading to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or redirect users to malware. The document body, though obfuscated, contains keywords related to search terms, supporting the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=florida+us+history+textbook+answers In PDF document text
    • http://kpovli.ru/microsoft_word_split_document_into_sectionsldcze.pdfIn PDF document text
    • http://shmelev.pro/89578957953ryhll.pdfIn PDF document text
    • http://tevalevas.22web.org/legegeb.pdfIn PDF document text
    • http://bolipoloweda.mygamesonline.org/vurizenax.pdfIn PDF document text
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/dufolibavadiwolijug.pdfIn PDF document text
    • http://jobs-ingenieur.best/97171976411trurc.pdfIn PDF document text
    • https://busejutepegojo.weebly.com/uploads/1/3/4/7/134773147/6011553.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/398724.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/8114727.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/ayatul_kursi_full_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/79389525546.pdfIn PDF document text
    • http://razanowonowut.rf.gd/auto_manual_selector_switch_kaycee.pdfIn PDF document text
    • http://fenulujexita.epizy.com/ruzepepiwopitexokafivetu.pdfIn PDF document text
    • http://zesugipove.onlinewebshop.net/aprilaire_700_installation.pdfIn PDF document text
    • http://padukejuredi.rf.gd/othello_act_1_scene_1.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/dialectical_behavior_therapy_skills_handbook.pdfIn PDF document text
    • http://nawirowig.rf.gd/what_was_the_origin_of_coke_6_glasses.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/52890347996.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/madame_butterfly_sekiro_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/motorcycle_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/lined_paper_template_for_story_writing.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_off0000d210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD210 5332 bytes
SHA-256: 46854c21e4c7c7fdbc928d8177aa4be30728ca5b45a898752f9ff8edeba1c1c5
font_01_sfnt_off0000e444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 10404 bytes
SHA-256: 246ea14207400932cd1ff994c61ea5bea9d48349888195cc791dec86321656d7

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