Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebb9792c980ed74…

MALICIOUS

PDF

78.4 KB Created: 2020-12-20 20:34:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d11a4021f9c436199857f427762f7ed8 SHA-1: 533f02e428e791ebb6231851a48de9259da6369a SHA-256: 1ebb9792c980ed7473943177c076a1a7848df4765971f4f49376aa0af4c245a1
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to a known malicious redirector and a link farm. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF, likely used for phishing or distributing further malware. The embedded URLs point to suspicious domains, and the document body, though obfuscated, contains text related to 'Heart of gold hitchhiker's guide' which may be a lure.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=heart+of+gold+hitchhiker%2527s+guide
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/busamoto.pdf
    • https://setekonireza.weebly.com/uploads/1/3/4/1/134131298/91339d31.pdf
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/medaxivojoke.pdf
    • https://sozatugija.weebly.com/uploads/1/3/4/8/134859818/sapevavukad-pukariwulelelo-kupizoripodo.pdf
    • https://lajadarizigatu.weebly.com/uploads/1/3/1/3/131384611/4643190.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nelizenejakarug/27753748657.pdf
    • https://static1.squarespace.com/static/5fde987dd61098631976af48/t/5fdf18b515a11837d0b3f39d/1608456374321/aditya_birla_mutual_fund_form.pdf
    • https://s3.amazonaws.com/genukopapovixo/best_malayalam_songs_2019_free.pdf
    • https://static1.squarespace.com/static/5fc0f24c403f5353fd95fd42/t/5fc333e71972c46e3c065f86/1606628328011/3622669556.pdf
    • https://s3.amazonaws.com/jexijer/jet_7x12_bandsaw_manual.pdf
    • https://static1.squarespace.com/static/5fc285aae5c7695ca9a5ff19/t/5fc6de43bfb90028be407cb0/1606868547107/gasijafaxemuso.pdf
    • https://s3.amazonaws.com/jagux/83693268759.pdf
    • https://s3.amazonaws.com/fosawef/mepopobidoxonelabuzuxet.pdf
    • https://static1.squarespace.com/static/5fc28553bda9c57a97c873ab/t/5fc82042e101942bf76463fa/1606950979370/badumot.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_off0000f453.bin
115c1a9bbb1598f18e2d8f8a7a8eeac0f55f55db2a841c3176e5cacb8edd1b13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 5340 bytes
font_01_sfnt_off00010683.bin
2350f81a46ce1f64f5fc84b65316271badd13174e541a910f5334d67efa89a8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 11048 bytes

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