Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70a94eb69f60076…

MALICIOUS

PDF

80.6 KB Created: 2021-04-19 06:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4dddfea2be29e414397faa3d9867ab05 SHA-1: d0e02f52f00c17c8935f1c5a1bd3afcb87334519 SHA-256: a70a94eb69f60076b8a651a5724d59f16240a9cbf7245260b1a2a9c6a0aa0d1f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or a method to distribute malicious content. The primary URL, https://ponafet.ru/strik, is likely the destination for the malicious activity, possibly to deliver a second-stage payload or phish for credentials.

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
  • 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.
  • 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://ponafet.ru/strik?utm_term=sore+patch+on+leg+no+bruise PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415518/normal_6004029815a04.pdfIn PDF document text
    • https://dipediras.weebly.com/uploads/1/3/0/7/130739778/remuvepota_nowiruj_jupoduwad_tuduvuxi.pdfIn PDF document text
    • https://diwimiwiwomenen.weebly.com/uploads/1/3/0/9/130969795/3722452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383444/normal_604cd49c3973e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379605/normal_606bddee31a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5fe7a6245f2c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_5fcf661b7723d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_606c73e76d766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_602c3665cd926.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/d5889c87-408f-4442-822e-789d8fe7e4a0/sevujipolexon.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/where_is_the_flame_sensor_on_my_amana_furnace.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/fivelimokenikawudires.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b041fa6-87cc-4bd0-939b-9f6f723e077a/44455729343.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/role_of_teacher_in_organizing_co_curricular_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/punctuation_exercises_with_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5746cb-3859-47aa-83ab-4f15f7937d40/91442448965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4598407b-378c-4bdd-a0fc-9699bdd40274/maze_runner_2_full_movie_free_stream.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_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 5436 bytes
SHA-256: aa1eb8457eef712d1ce1cd762bb4d054ceed6e6bfb77b306795aee0d6123e5b7
font_01_sfnt_off000110d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D8 10648 bytes
SHA-256: 29a2265ab3cc172bfa979c29fc11fd839abcf2aa28d56fed184c746ed0baed83

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