Malicious PDF — malware analysis report

Static analysis result for SHA-256 303d1afb08ff34d1…

MALICIOUS

PDF

63.2 KB Created: 2020-11-19 23:33:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 65fd57e88e99b6e0145e671ec7921621 SHA-1: 9f357d1f0fa533802b548bd6df2581c0b17d0eac SHA-256: 303d1afb08ff34d149bb7a283fb9ed80c40428c1cf0bbe6c0b58e5a97ee35b63
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to malicious or phishing sites. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics indicate a likely phishing or malware distribution attempt, possibly leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/aws?utm_term=caroline+chisholm+college+glenmore+park+uniform In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/a61639a9d.pdfIn PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/koxogipana_bibugudijajefes.pdfIn PDF document text
    • https://makigutezun.weebly.com/uploads/1/3/4/7/134707077/8fd71872664e.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/85992d0a35.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/gowena.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/giwolotiwipeguber.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1f52e3-4987-493e-bd03-58e472517c30/xudozagevudovidonen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79dbd73-f15c-403e-a569-6ff7399dcc29/pulefazinudam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcbdd2b8-5d27-4038-ad8e-a1d2297eae8b/kokezisom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd0e1e8-c0bb-483a-9875-1ae8332d491b/ruvebil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172fa8bd-3922-4283-9a66-9074a6f1df52/i_dare_you_book_by_william_danforth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1662f8d-a9c1-405e-9a50-5abcd68a1866/35211044758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5d5722-06c3-44e2-a9e3-547f47f2a51a/vafugunibabuzepakusiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6ad445-1121-46ac-b405-d75f6e1b3713/fizanumipizexatipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52c73b7-84e8-4614-a247-20f2d85f412e/44770566239.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_off0000baae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAE 5400 bytes
SHA-256: 787391279be93338b8deee9cc4253747ceaebe3ecbb48b3c38278ed631e4f733
font_01_sfnt_off0000cce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE2 10200 bytes
SHA-256: f34fcdf7858fac17d4ed13c06825110f2d5cdad76244cb9567a79fb12d19b9a0

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