Malicious PDF — malware analysis report

Static analysis result for SHA-256 942f06c7c3435dd2…

MALICIOUS

PDF

46.7 KB Created: 2020-10-04 23:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 604bc9bbdc48b2cfaa024350687cb7cc SHA-1: 931ba9d3719602f210c251dbb9fabce8d5643656 SHA-256: 942f06c7c3435dd245fa824a0f3bcb502a998f13ebf0e002c23022dd197e8bb6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/pify?keyword=comfort+aire+portable+air+conditioner+ps+121b+manual In PDF document text
    • http://files.mrsgrant.com/uploads/1/3/0/8/130814926/zugabenilagisedogo.pdfIn PDF document text
    • http://files.virtuouswomancreations.com/uploads/1/3/1/3/131380845/1329878.pdfIn PDF document text
    • http://files.guardiandental.ca/uploads/1/3/1/3/131384136/tolawusegixud.pdfIn PDF document text
    • http://files.kellybalmaceda.com/uploads/1/3/1/3/131380616/4070708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8948/8792/files/holt_handbook_fourth_course_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6498/6266/files/when_to_rob_a_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2014/3773/files/34327205433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1406/4798/files/microwave_egg_poacher_directions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5276/7131/files/lewis_and_clark_webquest_4th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/the_addams_family_broadway_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0944/0935/files/skyrim_dark_brotherhood_quests_interfere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/5551/5292/files/65076661290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0484/1114/files/scranton_middle_school_bell_schedule.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_off000068ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FF 5528 bytes
SHA-256: 01479dca87467d3445c18de5385d6b2084c2e173569b52d62965b170f58fffdb
font_01_sfnt_off00007ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA8 10356 bytes
SHA-256: 1912008f2455ccaba7b7870c4b866634427706994881e0325fb1a3b29acbd763
font_02_sfnt_off00009f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.