Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7ec4aca23bc67a…

MALICIOUS

PDF

133.7 KB Created: 2020-12-11 06:37:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 870a63162abd058402442af3e691503e SHA-1: ee3b04954b5385e0b3b0fef44d86e8a7c42ff032 SHA-256: 2f7ec4aca23bc67a84c14c66c737715c1e87440a6ef183374f9e2990a42e0205
214 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to redirector infrastructure and potentially malicious content. The document body, though heavily obfuscated, appears to reference educational material, suggesting a phishing lure. The presence of multiple external PDF links and a critical redirector link indicates an attempt to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=grade+10+filipino+module+1+answers In PDF document text
    • https://wufikaxom.weebly.com/uploads/1/3/4/8/134883002/8965118.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/4674555.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5fc78c18a7867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f90bed9169c4.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/554a412db6759bf.pdfIn PDF document text
    • https://xetasigebe.weebly.com/uploads/1/3/4/4/134443645/4904765.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/f2ace0.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/napazazuvowazuk.pdfIn PDF document text
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/4715862.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/33771967912.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/motakimilakejeb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78eacf59f035d0ccdc26a/t/5fcb0f599708706f3994f9d7/1607143257859/18386985539.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/essity_professional_hygiene_na_llc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00874a5bc066edfa0f7a0/t/5fc119f5f8cdb769c60a55c4/1606490613735/44631563232.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f19a27a199023ab591db/t/5fccc2c1fe657040d58f056a/1607254724370/can_coffee_cause_anxiety_and_panic_attacks.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/80073304346.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3715e3dfdd95b60e53d86/t/5fc4dbb2173fb5383b3c427c/1606736819287/lodevugojipujefu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cf94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF94 5504 bytes
SHA-256: 16782df064209e6542973ee37a7f15f6fe8ce05883c20f5377d9fc0be2ce715a
font_01_sfnt_off0001e24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E24A 11548 bytes
SHA-256: c12746cd9a3393f424f95576cc489647dd321cd93e4429e5f5aded5be62c8366

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