Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0b3a20822f2c8c…

MALICIOUS

PDF

34.9 KB Created: 2020-07-07 11:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 96164ff4d4bd72dca59bb158b69671f3 SHA-1: e284d7f511e0a3d177cd9f236bbb1f48bab29f04 SHA-256: 5a0b3a20822f2c8cb151ddb308c4ee51ebbe3677cc0188c1e2ec5bba1d257ecc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm with numerous embedded URLs, designed to redirect users to malicious content. The document body text, while appearing to be about a vehicle manual, is likely a lure to encourage clicks on the malicious links. The primary heuristic indicates a malicious redirector link, and the presence of a link farm further supports the malicious intent.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.com/wb?keyword=honda%20crv%202008%20manual#honda+crv+2008+manual In PDF document text
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdfIn PDF document text
    • http://files.thinkanomalous.com/uploads/1/3/2/7/132710787/nejugo_fetaxen_vijixer_nujogutoninuj.pdfIn PDF document text
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/3/131379434/94345039.pdfIn PDF document text
    • http://files.fittingroomligonier.com/uploads/1/3/0/8/130814672/sodumavasoso_sugenufefigu_tinivotosuna_sezomojodupebe.pdfIn PDF document text
    • http://files.negsbestthing.com/uploads/1/3/2/8/132815961/riwemuto.pdfIn PDF document text
    • http://files.whitegallowaysofwayby.com/uploads/1/3/0/8/130873907/fewubogukobavel-sixomolimu-mifip.pdfIn PDF document text
    • http://files.sopoochtraining.com/uploads/1/3/2/8/132815961/kawivibugakovuj.pdfIn PDF document text
    • http://files.nalinikrishnankutty.com/uploads/1/3/0/8/130874128/mewajuluxojuvafox.pdfIn PDF document text
    • http://files.musicatmainstreet.com/uploads/1/3/0/7/130739839/davetuxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://labajejumiwi.files.wordpress.com/2020/06/suritibubosiv.pdfIn PDF document text
    • https://rodavaje.files.wordpress.com/2020/06/26561476156.pdfIn PDF document text
    • https://jebozakid.files.wordpress.com/2020/06/losepa.pdfIn PDF document text
    • https://kavomigazera.files.wordpress.com/2020/07/nuzopana.pdfIn PDF document text
    • https://zizuxufu.files.wordpress.com/2020/06/tulavolinug.pdfIn PDF document text
    • https://jowoxub.files.wordpress.com/2020/06/bexiperomixegijorokesat.pdfIn PDF document text
    • https://zetamuse.files.wordpress.com/2020/07/gijiluvazimetonovije.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF4 5032 bytes
SHA-256: bb6e35699022407d743897bc7e987d381c0b957ef1236c90c1261b25f06f462d
font_01_sfnt_off00005be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE3 10284 bytes
SHA-256: 6742a0d4aa2b740a11737abc3c82aad2f2f8848fe03bb3f5fa6ac1542e9fb4af

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