Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3761babe3a3c7a…

MALICIOUS

PDF

49.9 KB Created: 2020-08-03 02:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 166244eaa78849e1dc061d56661c0358 SHA-1: 3e241e2c4e6c5dad37ea10fb61e6c1d982050064 SHA-256: 5a3761babe3a3c7a426131ce83628ffd9e6712a900508a902ef109609a373127
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'Honda gcv160 manual' and the malicious URL, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

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://ttraff.com/pify?keyword=honda+gcv160+manual
    • http://files.roseandwild.com/uploads/1/3/1/6/131636889/vozamu_runuke_jotuk.pdf
    • http://kaxore.deepspaceobjects.com/uploads/1/3/1/4/131452903/9a7e098d5d1a16.pdf
    • http://files.emerierosephotography.com/uploads/1/3/0/9/130969352/semusaluri.pdf
    • http://files.lowcostphotobooths.co.uk/uploads/1/3/1/1/131164153/dijejumadus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/bapoponununojumod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/fewupafaregivuwag.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/68308777965.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/nj_surf_report_belmar.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/joxasarotoparuzarifut.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/51533486229.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/65323628500.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/91053086869.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/super_smash_bros_3ds_dlc_codes_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/90976262734.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/44266938055.pdf
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/terapaxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/14184571691.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008527.bin
2efa0e51fa098c73d7dcb68b7c66e3b3783c4ff4bb3bf2c8597f92815fd978b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8527 5356 bytes
font_01_sfnt_off00009759.bin
cfafc33111824491ef7200657b0cf6dd2f60f50f9164dfcff5be842a36ca3780
pdf-font-stream PDF embedded font (sfnt) at offset 0x9759 10528 bytes