Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78fee1a53c43754…

MALICIOUS

PDF

74.2 KB Created: 2020-11-11 17:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 97147d6769792ad9809869e84f3195c5 SHA-1: 1c1079a7261d1bd522b4404964f838cbd9624d32 SHA-256: f78fee1a53c437541baddf298af0d2e60701625cb2e1712b846af262336f12b1
214 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. It also contains a large number of embedded links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous URLs and the ClamAV detection indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=scott+dorsey+merritt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5fa8131bedfd7.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/xedalomi-memakoxibu-xakibavopuzov.pdfIn PDF document text
    • https://zivopelorikeder.weebly.com/uploads/1/3/4/6/134677217/bodegotufaxobu.pdfIn PDF document text
    • https://juvuxoxeziw.weebly.com/uploads/1/3/4/3/134313380/sonelegomo.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/d4597b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_5f99995bbac9d.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://s3.amazonaws.com/fajeloninesitel/fisher_price_fire_truck.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/zasivulabagikujowitela.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/torifolad.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/20830210826.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/lumosetazezivu.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/4400582469.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/rakulamatovanunovakuxata.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/nissan_forklift_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/2590938260.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/taxagorigo.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAA 4728 bytes
SHA-256: 72021c76f65546a88c25011199d379efbd93d05f5238eac3374b95d0d8e111f8
font_01_sfnt_off0000deb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB7 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000ea1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 10332 bytes
SHA-256: 67c21186f9955cef2c26c8df72f2bff3786741c858780e7c9bdde39967e3ba90
font_03_sfnt_off00010d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D59 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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