Malicious PDF — malware analysis report

Static analysis result for SHA-256 2754fe68bb8fd0e5…

MALICIOUS

PDF

77.0 KB Created: 2021-01-04 23:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68f120942a9ab37403cbbe4f00ca28bd SHA-1: 5e9aa739c42156f8fa43f01febb3fc41b875eadf SHA-256: 2754fe68bb8fd0e54df2b8f1bc317cbef9955cfedc4e71cd230389dc2ce757c7
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Savage she hulk transformation', likely a lure to entice users to click the malicious links. The presence of many external PDF links suggests a link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=savage+she+hulk+transformation
    • https://cdn.sqhk.co/visukodo/3EaKhe7/vixavodekemuxor.pdf
    • https://cdn.sqhk.co/kupovite/eggphgp/muddy_heights_2_hacked.pdf
    • https://cdn.sqhk.co/telapunojawu/eLFWgiR/kerimurul.pdf
    • https://pedegafulip.weebly.com/uploads/1/3/0/9/130969407/zeruxajax.pdf
    • https://cdn.sqhk.co/mugejufunij/icbhbhI/solitaire_ring_settings_with_baguettes.pdf
    • https://cdn.sqhk.co/sisadenev/qnigpm1/wonamapuliwizizaxibavob.pdf
    • https://cdn.sqhk.co/tinipuded/ro98Uhd/sliced_bread_best_invented.pdf
    • https://tibefuwejar.weebly.com/uploads/1/3/4/3/134332688/fotaka.pdf
    • https://renalulawe.weebly.com/uploads/1/3/4/7/134735886/9473840.pdf
    • https://fiwixenolo.weebly.com/uploads/1/3/4/4/134493020/jujapidivu_zowigeruluboje_fekib.pdf
    • https://cdn.sqhk.co/seponidozit/jYijcaA/metal_slug_anthology_ps2.pdf
    • https://cdn.sqhk.co/taruvufufezu/e0gfghr/ziwinos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0615bef6-13d6-4f62-9daf-3dd5010dc340/bezoravitirevejevo.pdf
    • https://uploads.strikinglycdn.com/files/52a6a0b6-846a-434c-8d0b-eb53bb1f053b/zibajanu.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_off0000effe.bin
5ae5cdf8caae45dd2242a5513ca96e06107d3f316459886743acfebd42181349
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 5408 bytes
font_01_sfnt_off00010242.bin
7a2322acd1b02b6a7026b6fba2a0ba117d0f05ebf6a8d196dba285d746315dfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 10776 bytes