Malicious PDF — malware analysis report

Static analysis result for SHA-256 0144f760644343fa…

MALICIOUS

PDF

84.7 KB Created: 2021-09-13 22:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 03302ffff1bd5c4e4613ec2430398991 SHA-1: 618dd2b7a8ab580ee1fe1e143240b0df01d8b192 SHA-256: 0144f760644343fa3bcfecb6f593facd3e52ab6859a363cc995716fb47ac05f0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains a large number of embedded URIs, many of which point to disposable hosting or raw IP addresses, indicating a link farm designed to redirect users to potentially malicious content. The presence of numerous links and the IP literal in a URI strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://tele-fonika.pl/upload/file/witibedepogagowif.pdf In PDF document text
    • http://tidomusica.com/uploads/files/202109091804383695.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/rugupojujokunigoru.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/lesijeve.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/suzizodizokekoxureda.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/pinoneso.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/gatifirazigiwowipof.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210911013230.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f20eccea3b---lubumupuxogifototaderoz.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/kosereba.pdfIn PDF document text
    • http://www.ecrivains-consult.fr/easyonline/ckfinder/userfiles/files/naronuburepewo.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/dejugofaxowitu.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/gegetujifomedeju.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/16342509254.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/girusejomuganulugower.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/86916347670.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/nelokelitipawiv.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/47638034188.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/87774952119.pdfPDF link annotation
    • http://futsalcb.cz/picture/vtextu/file/51745011701.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/80224831442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=aumentare+volume+chiamata+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE854 10612 bytes
SHA-256: 3eb37d6c2b5b3c10a60516f2c6254cd97a246cd6d98ca416448c9e9e6d6e709a
font_01_sfnt_off0001005e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005E 17232 bytes
SHA-256: 6dc1e344002fa90948c40c97afca31821167864a21b0196af48aac45f65a4ca8
font_02_sfnt_off00012d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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