Malicious PDF — malware analysis report

Static analysis result for SHA-256 f724c2fd32ea4701…

MALICIOUS

PDF

74.4 KB Created: 2021-05-31 00:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 920ecb55d56852083055a414e3cbed61 SHA-1: 236e05556c73ad7342063770737b0667095e8ab8 SHA-256: f724c2fd32ea470174956a835856da9c6600cf8e0ce0dc18fc7cc64cefbb3ddf
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many hosted on disposable domains, characteristic of a link farm used for SEO manipulation or to distribute further malicious content. One of the extracted URLs, 'https://resalured.ru/strik?utm_term=can+you+get+mods+on+minecraft+pe+ios', suggests a potential lure related to gaming content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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
  • 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://resalured.ru/strik?utm_term=can+you+get+mods+on+minecraft+pe+ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5fdb8b8970704.pdfIn PDF document text
    • https://dagukipaxezij.weebly.com/uploads/1/3/4/3/134352206/mutopexopipiw.pdfIn PDF document text
    • https://doladilaraju.weebly.com/uploads/1/3/4/8/134854069/483c55a1d929c03.pdfIn PDF document text
    • https://jixeneneme.weebly.com/uploads/1/3/4/0/134096386/xetivowof.pdfIn PDF document text
    • https://wapojopaboxijok.weebly.com/uploads/1/3/4/7/134747084/6381530.pdfIn PDF document text
    • https://mamonujiduvef.weebly.com/uploads/1/3/4/5/134525279/niloxunowiwapovefez.pdfIn PDF document text
    • https://takotowi.weebly.com/uploads/1/3/4/3/134356266/7229779.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/xupewubil-peguvi-mofovajipo-nazubigumeso.pdfIn PDF document text
    • https://mazefitarunakur.weebly.com/uploads/1/3/1/4/131453858/rukatax.pdfIn PDF document text
    • https://tavigawatogup.weebly.com/uploads/1/3/5/3/135389884/kelibod-tawonej.pdfIn PDF document text
    • https://xerirexu.weebly.com/uploads/1/3/4/5/134592073/mepetik.pdfIn PDF document text
    • https://tilipigenetuwa.weebly.com/uploads/1/3/4/7/134770736/e74f3682d50bf8.pdfIn PDF document text
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/479338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_606247771431e.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/3f78bed2-2ee4-46de-bc84-a5dc7be4b6d5/piratefogej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c85d022-5b79-4c6d-8512-e8136568fae5/67168199602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a9b57a-71cb-46bb-9da3-e823cd2ea18c/68668931998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad30400c-a860-4ad1-932b-bb710eba4584/fewowe.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_off0000e475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE475 5448 bytes
SHA-256: 7673b95fb15be11450eacad6c89729526e1e6e0bdb4d6f9a2f8d5d5b54fee986
font_01_sfnt_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 11000 bytes
SHA-256: a6343edb356846bf61d32906900c8b3220a9d8e09d8de87a3348d40c11bd35b2

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