Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a34ac4524c166e5…

MALICIOUS

PDF

58.2 KB Created: 2021-06-02 09:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fc1d7756baeaedf3c00279365cbadb6c SHA-1: 27f2485b25874291c62fa4050baf4279e9f2237d SHA-256: 2a34ac4524c166e5162c823fccc2de4488f9d2a56057fec71d7ff780c71cce61
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One of the primary links points to 'coretry.ru', which is likely part of the malicious infrastructure. The document's structure and link farm behavior indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8425

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
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://coretry.ru/pbw?utm_term=sony+receiver+str-dh770+remote PDF link annotation
    • https://kagujovo.weebly.com/uploads/1/3/5/2/135298661/72101.pdfIn PDF document text
    • https://kugixixubeleji.weebly.com/uploads/1/3/4/3/134324677/8066034.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4448743/normal_60b51368c5853.pdfIn PDF document text
    • https://ranepudanaliv.weebly.com/uploads/1/3/4/0/134000181/339d65.pdfIn PDF document text
    • https://detazemunowovi.weebly.com/uploads/1/3/4/7/134704720/8d42f74af6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_603128cbae325.pdfIn PDF document text
    • https://jusodudefepad.weebly.com/uploads/1/3/4/6/134650432/lamafeme-lufuramukuto-bevitezasoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fcfe606a43cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_606622959c9bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414860/normal_604b343778367.pdfIn PDF document text
    • https://rakimazigikan.weebly.com/uploads/1/3/2/3/132303322/pagemolimavoka.pdfIn PDF document text
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/e77a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460680/normal_5fdebbdfb1f3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_606627ffcb2a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473642/normal_5ff52d9b12a64.pdfIn PDF document text
    • https://vovowiki.weebly.com/uploads/1/3/2/3/132303124/3002763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_60163c43d07fd.pdfIn PDF document text
    • https://dakezevowefop.weebly.com/uploads/1/3/6/0/136088489/zezubiwuneve.pdfIn PDF document text
    • https://kajizifobizixa.weebly.com/uploads/1/3/3/9/133997117/gopafa.pdfIn PDF document text
    • https://faxemidarasagim.weebly.com/uploads/1/3/4/3/134341424/2931922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb4eca4-4a07-49ed-87d8-4e4adee233f6/sukoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ae4c7d6-8f4e-4d96-99b7-b7819e24994d/how_to_make_a_gravity_water_feeder_for_chickens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52edca4-713d-4c1d-98c2-1733ae00b56b/the_magicians_season_3_episode_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c484f15-13ea-4ddc-bcc4-b664e3fb42ad/how_to_pair_groove_onn_wireless_earbuds.pdfIn PDF document text

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