Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c80224fab9ecda1…

MALICIOUS

PDF

47.5 KB Created: 2020-10-08 07:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3edc87c2d4f3d9e28fbdfdfb6e4ff736 SHA-1: 74a85b88c229cce2c192e6e463eff98dced3aaad SHA-256: 9c80224fab9ecda17803ce051c6ff0f5f5dcc6c90fde56d405e33928ba924456
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The presence of a link farm suggests an attempt to distribute malicious content or phish users. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/strik?keyword=carape+kralja+petra+pdf In PDF document text
    • http://doliri.zhuweiying.com/uploads/1/3/0/7/130776445/3894781.pdfIn PDF document text
    • http://lapatum.autorestomod.com/uploads/1/3/1/3/131383664/4372121.pdfIn PDF document text
    • http://fawazosi.studiojsd.com/uploads/1/3/1/4/131454120/sigemafuta.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/tizubejavajibulu.pdfIn PDF document text
    • https://site-1039992.mozfiles.com/files/1039992/84082532758.pdfIn PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/53552749158.pdfIn PDF document text
    • https://site-1048176.mozfiles.com/files/1048176/navemorawaxu.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/gofupu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7956/4448/files/zajizowojukefojikusukiter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5172/0090/files/86882614479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8247/6448/files/poulan_wild_thing_2375_chainsaw_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3180/9176/files/rx-v573_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/implementation_of_lean_manufacturing_in_garment_industry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d56685d0-1a0b-453e-96f4-115dd3e588af/35335843124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36af9440-cdf9-4bf5-a762-c1865c8687bf/puwolemobaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48285cae-cb10-4353-8bd4-20fdfa24c828/5680881309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f203f9c0-888f-4213-af85-c3a9eeee1837/sijiludukukarubifatokari.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6293 4900 bytes
SHA-256: 7e0e6c506137d82e363c59b3ba7f759bc2387b0387f1099c4da5d24e9f3a50d1
font_01_sfnt_off00007357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7357 11884 bytes
SHA-256: 684d628d39ea1e6c1fd254ec24c25c88e3d86bb9caa4fdb650256c8ab92c32ea
font_02_sfnt_off00009a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8B 16556 bytes
SHA-256: c20db00ab14a67abe373594d37ed1ef5ca762995452b34be27a62eb4c92fd5ea

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