Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff09f66c5941a59…

MALICIOUS

PDF

75.4 KB Created: 2021-05-27 10:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51223f969754bf5fcea46ab318f07425 SHA-1: 129383b3ee22e8f693cb04f15be58be09f1b11c8 SHA-256: fff09f66c5941a594807c1c8feee384e126ef28cdea28b822595ab697ac8c64c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bonivodetago.weebly.com/uploads/1/3/4/5/134517527/239d4b34467.pdf
    • https://nodajalij.weebly.com/uploads/1/3/5/9/135990600/jebigezakum.pdf
    • https://faruxolumapegi.weebly.com/uploads/1/3/5/3/135341403/lofes.pdf
    • https://fusajowaxoxa.weebly.com/uploads/1/3/5/3/135344195/tasanurofopu.pdf
    • https://vasigigu.weebly.com/uploads/1/3/4/6/134607878/c09fca7.pdf
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/napukedubumibusuxub.pdf
    • https://towavakivuno.weebly.com/uploads/1/3/5/3/135318123/bcc6c03f0e4.pdf
    • https://mexakogu.weebly.com/uploads/1/3/5/9/135981712/rikowezofazafo_dodusakufovume.pdf
    • https://luxovifawus.weebly.com/uploads/1/3/4/3/134341193/dabab.pdf
    • https://xuxufagitagagi.weebly.com/uploads/1/3/0/7/130740521/wiredilomalinesan.pdf
    • https://murozukuzofapu.weebly.com/uploads/1/3/4/7/134716639/818158c70f9df.pdf
    • https://kajavowonedefa.weebly.com/uploads/1/3/4/8/134858644/baaf7f1f.pdf
    • https://mibigadoguful.weebly.com/uploads/1/3/4/7/134759919/xevoseb_nanunetusiforu_nobusola.pdf
    • https://nepefesin.weebly.com/uploads/1/3/1/4/131410606/guvibubekoje_nenorakasowu.pdf
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/575234e1.pdf
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/soxew_sabokuk.pdf
    • https://levunabul.weebly.com/uploads/1/3/1/4/131407164/fupigelazu_rifutodasega_semexug_kamobewibuj.pdf
    • https://vusexojepaxeva.weebly.com/uploads/1/3/4/0/134096357/6514242.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/Ecv9gJ3Ok6E/wb?keyword=how%20to%20bypass%20water%20filter%20on%20lg%20refrigerator
    • https://uploads.strikinglycdn.com/files/083a488a-a9ec-4456-9a1b-9229680056ca/fuxuzurefunareto.pdf
    • https://uploads.strikinglycdn.com/files/97ea3436-ae0c-4809-9dca-ea77ca79184e/losikufizuzesov.pdf
    • https://uploads.strikinglycdn.com/files/cdd87d0f-69bc-4881-996d-fe3843f9ad8a/how_to_calculate_interest_on_tally.pdf
    • https://uploads.strikinglycdn.com/files/8789f242-41c5-4285-8301-7d4234bfb06e/pones.pdf
    • https://uploads.strikinglycdn.com/files/8d21c295-0b0b-4e99-9133-f5bbf29e0c97/navy_seal_trident_pin_image.pdf
    • https://uploads.strikinglycdn.com/files/7cc991fa-e401-4ff2-a654-e93e98aba977/29978297169.pdf
    • https://uploads.strikinglycdn.com/files/72fc60d6-3749-4a3f-ab89-45befc057713/indian_navy_nausena_bharti_2020.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e891.bin
53fd00515cd6de1677292b811ebe02d150ac0497f657534857484154409babd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 5364 bytes
font_01_sfnt_off0000faee.bin
00636c2eff475b7378f4f44165a9286927c639e1e9443d8431a0068d9410e0f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 10668 bytes

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