Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97da28556c4a322…

MALICIOUS

PDF

50.4 KB Created: 2020-10-19 18:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b4761f40efb37fc8988b82eadcb6277d SHA-1: fd8172c3d158486abbff538e5576bc4df22e9c85 SHA-256: a97da28556c4a322a168a028e24ec2520a5c01f28c2cf6611c9a3a8423dd6031
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://ttraff.link/pify?keyword=electrical+estimation+and+costing+pdf In PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/5695812.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/gasiluw.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/xirajurifugubuxozigo.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/3868b021d7a585d.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/4ea5f8282d36a85.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/favosinajefexi.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/gewobo.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/1009128.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/1/0435/1895/1576/files/blowtherm_ultra_2000_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/hbm_750_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1734/7487/files/mowutozuwetales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/stihl_ms170_chainsaw_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e5e234-a3b3-4d5c-ad85-647f9405d8d8/12090262969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1eb7b07-db95-4bcc-9dda-3ab1a69e1aa2/74934826795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1129/2314/files/80922637356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5556/0872/files/proform_585tl_treadmill_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1181/1739/files/kefunedogebinububu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5849/0275/files/detugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/pejazozopiwazarokezikos.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_off00007867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7867 5220 bytes
SHA-256: 97931f3d8a95cc7df49a0d5541facdcdfe8ff6a2e473c6d5dda2412bef0e35d5
font_01_sfnt_off00008a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0A 10580 bytes
SHA-256: a663f2197e8ca1ee466512a8865944e1a86fb398fe6c3079836aaa8277929c33
font_02_sfnt_off0000adae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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