Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc6fcba57910e5e…

MALICIOUS

PDF

49.6 KB Created: 2020-12-18 00:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efc6a9afcfa01f9bc34fce43de6997aa SHA-1: 5b07e7431535f86f7bebba3372dc61f366e195a8 SHA-256: 7fc6fcba57910e5e3cbc856d7dea6608fb9c119a4278ae4de5e5ae3b3595aac6
262 Risk Score

Malware Insights

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

The PDF is designed as a lure, using a seemingly innocuous title to disguise malicious links. It contains numerous external links, many hosted on disposable domains, pointing to redirectors and potentially further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7228

Heuristics 6

  • 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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 49 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/aws?utm_term=happy+birthday+piano+sheet+music+intermediate+pdf
    • https://tetegewa.weebly.com/uploads/1/3/4/7/134761184/bivewak.pdf
    • https://rawofaweka.weebly.com/uploads/1/3/0/7/130775842/9435080.pdf
    • https://notilapixoto.weebly.com/uploads/1/3/4/3/134397855/vesubo_tagabugixek.pdf
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/fbc730.pdf
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/3128389.pdf
    • https://wunanowadile.weebly.com/uploads/1/3/4/6/134600652/7548436.pdf
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/fegetururiz.pdf
    • https://bidoruwo.weebly.com/uploads/1/3/4/6/134651737/7244007.pdf
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/3383988.pdf
    • https://xivogele.weebly.com/uploads/1/3/4/3/134324821/5723915.pdf
    • https://tatunuzaxu.weebly.com/uploads/1/3/4/5/134596213/sopujibedixa_rezugo_luwezodarabo_lalokiw.pdf
    • https://dekobela.weebly.com/uploads/1/3/4/3/134332871/6a576e1a257.pdf
    • https://s3.amazonaws.com/pazifetanegapu/gomevekewejojuzebirurar.pdf
    • https://uploads.strikinglycdn.com/files/51d0413d-450d-48a3-9c24-da0e5fed68a5/3321930309.pdf
    • https://s3.amazonaws.com/palevijuj/nubimovo.pdf
    • https://static1.squarespace.com/static/5fc12947bf71053ccb11d3e8/t/5fc98fa2e4017829c1625081/1607045027504/1995455032.pdf
    • https://uploads.strikinglycdn.com/files/6716d11d-e83f-4048-a7c7-e87e6772106c/65050314720.pdf
    • https://static1.squarespace.com/static/5fc5434cbda9c57a97dae9da/t/5fcf1e8455629615614b7cf7/1607409284334/noco_boost_sport_jump_starter.pdf

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