Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e2577728bf69eb…

MALICIOUS

PDF

64.6 KB Created: 2020-11-25 19:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2f2a7ffa30d2a51c4dbae5d121f4c613 SHA-1: 183d984c05c8593f3a82690e2265ab3a45137ebb SHA-256: 11e2577728bf69eb0b5019f43a8e2926fe686d80579fa4f87c7b1bd0548a0965
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary heuristic identifying it as a link farm. The document body, though heavily obfuscated, appears to be a lure related to 'Fahrenheit 451 crossword 1 answers'. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely for SEO manipulation or phishing.

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://trafftec.ru/123?utm_term=fahrenheit+451+crossword+1+answers PDF link annotation
    • https://tijaworiluwulu.weebly.com/uploads/1/3/4/3/134363233/xivonizegisexot.pdfIn PDF document text
    • https://vamepuruzaf.weebly.com/uploads/1/3/4/3/134352512/tonivexuz.pdfIn PDF document text
    • https://nivuvibopaxaji.weebly.com/uploads/1/3/4/5/134588818/kozokesexogiwur-tuvumogixirikir.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/5890630.pdfIn PDF document text
    • https://lesorini.weebly.com/uploads/1/3/4/3/134376350/57559.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/d81b1371-deaf-47db-bf1a-715f3d4150fa/when_was_the_camera_invented.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/notekezim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f75c33-41bd-409e-8be3-7bc8ee95df75/ginixevasuzadojetati.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/zavodigazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c332808b-5863-48f5-8fc6-be2245895737/65809281134.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/kesulusibujepilumipugotuk.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/cccam_2._3_ipk.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_off0000c315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC315 5308 bytes
SHA-256: cdf3b4f22c4f7eb66ca06a991dd81d614e675bdb033aa521ebd6af27b8e1f273
font_01_sfnt_off0000d53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53F 9560 bytes
SHA-256: 40387bca411519f4b0a9699c446f994ee2c1a844fc42fc394e3bbabf605b845e

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