Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c58514e0df496d3…

MALICIOUS

PDF

61.1 KB Created: 2020-08-16 01:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0567aca2227b5d7b6d87569480132022 SHA-1: 381869d90cc3d13f27203badb5d3cecde1ec8ecb SHA-256: 0c58514e0df496d36e62b5dad5c7070a66c28cb2ca01b9a71d2e54f6f6028efa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'all verbs list in english pdf'. The presence of embedded URLs and the heuristic firings strongly suggest a phishing or scam attempt designed to redirect users to malicious infrastructure.

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.cc/wb?keyword=all%20verbs%20list%20in%20english%20pdf
    • http://files.empowerunit.org/uploads/1/3/1/3/131384468/lozapiwo.pdf
    • http://xidazus.girlstothemic.org/uploads/1/3/1/0/131070314/fanezufu_difebimifa_tolaxi_vejuwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/35632552171.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/11442645367.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/14880784337.pdf
    • https://cdn.shopify.com/s/files/1/0437/2345/6661/files/98767412830.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1389/files/6991976499.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/basic_korean_language_with_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/40682465761.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/85835084133.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4982/files/awaken_online_dominion.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/72385627085.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_off0000ab56.bin
95a7f02040d6093b114dd144b3f85a36dd672e20c630d984ccb3ce44e6a232b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB56 5284 bytes
font_01_sfnt_off0000bd40.bin
f7368f7809ba05f71b541383e98b3fb0260c297f85d3392f4f5aa5e4572ab0b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD40 13476 bytes