Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cdc5f45e1cfc9c…

MALICIOUS

PDF

310.1 KB Created: 2022-05-28 11:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: d11c4a0806697b2fa53b00b2c3c33ef0 SHA-1: fb1dfe0dff99bbdf84602244980e86573500cfb4 SHA-256: a5cdc5f45e1cfc9c8cc491f2f523aefc75cfd89d8873a1f06d7aaeabb1bce248
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to lure the user into a phishing or malware download site. No scripts were extracted, but the overall structure and heuristics strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9333

Heuristics 4

  • 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://yubit.co.za/XSRYdR1H?utm_term=5+speed+manual+transmission+diagram+for+1991+toyota+pickup+for+sale+florida
    • https://kojageku.weebly.com/uploads/1/3/3/9/133997895/ropegulefeso.pdf
    • https://wibutusus.weebly.com/uploads/1/4/1/5/141514735/6f43c6.pdf
    • https://nupureforisuro.weebly.com/uploads/1/3/4/3/134353583/7017540.pdf
    • https://rifopiponekusu.weebly.com/uploads/1/3/5/3/135346758/mimafuginezo.pdf
    • https://tixosame.weebly.com/uploads/1/3/4/5/134523113/5906690.pdf
    • https://rerofalubi.weebly.com/uploads/1/4/1/7/141714344/9315336.pdf
    • https://hoangvan.vn/wp-content/uploads/files/fafiwomuruv.pdf
    • https://efficimm.fr/userfiles/files/19168720.pdf
    • https://xaxurudi.weebly.com/uploads/1/4/1/6/141682287/758a5483665457f.pdf
    • https://bolafuba.weebly.com/uploads/1/3/4/6/134668532/nabuvidarepesal.pdf
    • https://patalilax.weebly.com/uploads/1/4/1/3/141344249/6760546.pdf
    • http://klpa.net/userData/board/file/fasononobefelakojoz.pdf
    • https://dosoxikovere.weebly.com/uploads/1/3/0/9/130969917/rexulebagubesadar.pdf
    • https://kixodebu.weebly.com/uploads/1/3/2/6/132682063/3404992.pdf
    • https://fosogizubosa.weebly.com/uploads/1/3/1/6/131637108/deponovasexuti.pdf
    • https://bosaxapefafel.weebly.com/uploads/1/4/1/3/141379327/c7104229b617a7e.pdf
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/af9d47.pdf
    • https://xubesizodumuruk.weebly.com/uploads/1/3/4/7/134703494/fukoxorigobut.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00046965.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x46965 16792 bytes
font_01_sfnt_off0004817c.bin
044c78a3a2998957319a5109dc5428191a1653aff92a71ad43fd3b110e6cc9b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4817C 11524 bytes
font_02_sfnt_off00049caa.bin
8e64a27337de485cd6451b027d76c88d299fb42f90c2d2af9b971329ec3fb490
pdf-font-stream PDF embedded font (sfnt) at offset 0x49CAA 17232 bytes