Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba8932db82aaa69…

MALICIOUS

PDF

78.6 KB Created: 2020-12-26 23:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ed35f30b8022f84056c29af4af9116c0 SHA-1: e0f2ecb3f92942f7a64a06682417cf2d3c870037 SHA-256: bba8932db82aaa693f3e87edf4e3836a9985ad684c10af63cfa5668d35de9b7a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=4+and+goal+2019 PDF link annotation
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/5639806.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/9be944c92ce7d.pdfIn PDF document text
    • https://xumusozopojuvuj.weebly.com/uploads/1/3/1/3/131398507/524118.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/ziban.pdfIn PDF document text
    • https://lizifonaw.weebly.com/uploads/1/3/2/3/132302762/pijalurunikij.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/gesudorafizazu.pdfIn PDF document text
    • https://vukaxibunima.weebly.com/uploads/1/3/4/8/134885707/gagezotujunipev-kogitomur-tosowew.pdfIn PDF document text
    • https://vamewifajezik.weebly.com/uploads/1/3/5/2/135297159/womeje.pdfIn PDF document text
    • https://dakovogusuzulex.weebly.com/uploads/1/3/4/5/134595229/9779a2412bf28.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/fd8fa7c5-bcd8-4e37-9c4e-c640cadb1b3b/30113894915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8d1c16-5ccb-4b69-8b5c-34633cc8dc6b/65174519223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f0db46-1ef4-46c9-b2ce-2c1662985d0a/hot_milk_cake.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/gumudotuluwuzaronapakexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60ae4b7-9672-41f4-84af-8b95924cd0cc/robomonaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588ac9d9-f351-40bb-9fe9-57b208a8011d/sears_hillary_tent.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_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 5196 bytes
SHA-256: eddee91e96c9bd246a0056b68d00a64c517e97679332693fa79b51e5ccfd56dc
font_01_sfnt_off000107c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C1 11192 bytes
SHA-256: 526a7f146ba87763b989f1fed6dd47c6242691d00b6084dc0bdd21690b7f047c

Open this report in the interactive analyzer, or submit your own file for analysis.