Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a0a0d8706c58ec…

MALICIOUS

PDF

78.4 KB Created: 2021-09-13 20:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 14a44bd45d191892a4a1c2498222204e SHA-1: 745cad9751d53bea1543b9b6347fece3c2bd67ef SHA-256: 49a0a0d8706c58ec8e9131158b0bb8de0362b39d9973b12c812610dded8c9ffb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are hosted on potentially disposable domains, suggesting a link farm or phishing lure. The presence of urgency and callback lures further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://le-nora.com/userfiles/file/97458189696.pdf In PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/71595226345.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/d079367f4bf62c26437c7219d46c9ef1/puzuzofiwex.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/donesiro.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/wifemubopunizoradifatud.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/53315709632.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/26798639389.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/sezowutuwe.pdfIn PDF document text
    • http://esistore.com/userfiles/file/kunixamegene.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/45416538726.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/tawan.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/17523049987.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/53087583195.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/kagulapuvofejinisalarev.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/32394827813.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/83246610831.pdfIn PDF document text
    • http://iccjsc.vn/images/uploads/files/radukogunoxefotu.pdfIn PDF document text
    • http://gapp.fr/medias/files/48766249532.pdfIn PDF document text
    • http://pacemakerpressintl.com/uploads/assets/file/texodofidavi.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/92339425295.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f463010874---53555845878.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/minavesuveser.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=john+wick+3+filmyzillaPDF 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_off0000ca11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE228 10616 bytes
SHA-256: 7e2c651ef7ca46a34eba453a6ef0149b3a7df4124b96ac7fdd3c8be53686b083
font_02_sfnt_off0000fa5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5F 19560 bytes
SHA-256: 4d8a0ffbe7b4fb1d8f202234ed343eb6f21009cf8b64d3e597c21c64a3f54e0c