Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b97b8eb92e2afd…

MALICIOUS

PDF

121.2 KB Created: 2020-12-28 05:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b8035c40e98c07f7a0a8c6ef95273f25 SHA-1: 94785e7bf5a8a79424f0b05ca65f9ab47a6a799b SHA-256: a0b97b8eb92e2afdd987951b975f4a1ba6d92e134ab7c75bbbdb44ee079186c7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL pointing to 'trafffi.ru', which is likely part of the phishing lure. The document body, though heavily obfuscated, appears to contain text related to news reporters, suggesting a social engineering pretext to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=channel+7+eyewitness+news+new+york+reporters PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490369/normal_5fd7d6f543ff8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457330/normal_5fc9cc99a9f8e.pdfIn PDF document text
    • https://xiletepegokif.weebly.com/uploads/1/3/4/3/134319576/nikujulimoxuxe-latugupotorirov-kusavozabejari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484818/normal_5fa958057bbcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8bd67844562.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/viresolet.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/f35af7f0-836e-4bee-895d-6209f5a3d1b6/31712884001.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/baileigh_lathe_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b00c204-1b5f-4954-aba4-5065ded6d7b5/how_do_you_iron_polyester_pants.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/frozen_crib_bed_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/summary_of_absolutely_almost.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6E 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off00016a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A62 5148 bytes
SHA-256: f74a3fb9dce90a9c00c21d200b7d30a9a9440a28c39f4f3f8391146a340ca9c1
font_02_sfnt_off00017bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BF2 10884 bytes
SHA-256: 4a1e884ea2cb176add1eb34848784bf6e1f6b93aa583640762bccacd96ef1d8d
font_03_sfnt_off00019a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A4F 11528 bytes
SHA-256: e721409a8374616aaeeb60e98c177bebbaa724b8f6e39c4a0302806431047116
font_04_sfnt_off0001c1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1C3 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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