Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c22a097e814f8bf…

MALICIOUS

PDF

72.3 KB Created: 2020-12-17 23:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0e263b894f6f0432a90ec4acd0c08c69 SHA-1: 118da490f70d3d1fdbfa23e291bc1bd723d9d3eb SHA-256: 7c22a097e814f8bf978b3c9e231eb788e099983dcb3b69bfeeab26eb78111094
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm for SEO purposes. One of the primary external links points to a URL that appears to be part of a malicious campaign. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=knotts+berry+farm+ride+height+requirements PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444885/normal_5fa5b69e806b9.pdfIn PDF document text
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/0218eca78d6849.pdfIn PDF document text
    • https://bugituwixumanuz.weebly.com/uploads/1/3/4/7/134722584/wuwamox-jewama-jarovevetovoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8f881e8d-d00b-408d-86e1-f09eb2d9756d/67736823025.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53da9affbf90a66070036/t/5fd6886bd654060362cddbfa/1607895148241/practice_6-_1_classifying_quadrilaterals_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4753508e-5fd6-4d6c-9839-f57cf443bf69/mobi_to_epub_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1796fdf132613bbc1d0b8/t/5fca953a453475472aad0a2d/1607111995900/bon_jovi_you_promised_me_heaven.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/plasma_burst_2_hacked_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/popepatum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1eb652f-66f2-4267-868e-fcd4e0faf4d9/how_to_find_the_orthocenter_with_coordinates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23fbb21f-cd2b-4c0b-9cbd-29f7d2e19334/94357964476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f671c3-a9fc-43b3-b316-135482b9e75a/zirof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD019 5508 bytes
SHA-256: bdc23223b1955b573105f2166867febe1adbd6b0d9ffce6309f36652ad5138fc
font_01_sfnt_off0000e2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A0 10400 bytes
SHA-256: 689618a35774cc681d86af6a1413af818af27deac00553a3ccfb6274377a12ce
font_02_sfnt_off00010646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10646 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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