Malicious PDF — malware analysis report

Static analysis result for SHA-256 804f2ded7425959d…

MALICIOUS

PDF

70.4 KB Created: 2020-12-11 18:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 54c4165dfecee20c7bd634696fd240ce SHA-1: d7906c025e2b55754d27f6e1abc36ca5644e0e1b SHA-256: 804f2ded7425959d6a25c3a30895d6d1cc99321a22163fc1d42b38a688dc4169
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a suspicious domain that appears to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to employment, likely intended to trick users into visiting the malicious URL. The presence of many external links and the ML classifier flagging it as malicious strongly indicate a phishing or scam attempt.

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://trafffe.ru/aws?utm_term=modele+attestation+pole+emploi+employeur+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5fa718a7085ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_5fd11365ddddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5f8ae62eecc2e.pdfIn PDF document text
    • https://biparobotimipus.weebly.com/uploads/1/3/4/4/134498468/nodowej.pdfIn PDF document text
    • https://masejufubalabej.weebly.com/uploads/1/3/4/3/134388341/nulimevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5fa08b7e496b8.pdfIn PDF document text
    • https://vowobonu.weebly.com/uploads/1/3/4/8/134853209/xexeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc68db56609fd0ee7b8a05a/t/5fc7e4b0e6f2ed3f50e014f8/1606935731598/xifokupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c52241-965a-44b8-841d-b3893c0b5ccd/zelezasefafurojobekitix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63fed8d-c395-474a-8315-2a42ae7004f6/93962871168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79cf3f07-bda1-445a-8fe1-cb8cecf36e5f/91330044314.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/the_deep_blue_good-by_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ffd3bf-acc6-4a30-9419-c25cd9886e66/moxovasawirowomefafuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d02a124-b6a9-4ef4-aef5-d6adc2771a49/liberalism_ap_euro_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/tuzomegakarozuxorowerot.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_off0000cb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB16 5292 bytes
SHA-256: 1800090da73f21db98ab01b1cb13770960cfa2cfbc4ad7606adf3b8b53bfb619
font_01_sfnt_off0000dd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0D 3092 bytes
SHA-256: 5eb42508b036b90880d566e8d7c21a81337c6b96edcfe0333b1b2bef08978258
font_02_sfnt_off0000e9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CE 10060 bytes
SHA-256: 0d2d24006b63891e5deb58a06cacc92e1cf364ddd05be08e3fe49a0d5b979e40

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