Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11d63f77f2af875…

MALICIOUS

PDF

97.3 KB Created: 2021-01-05 06:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 59402a1ca159f834a4a1acc2942b5fc4 SHA-1: 905b1a1310499781b535693b383cfd0fa5e9925d SHA-256: a11d63f77f2af8758519dbd89e6df45e489b42646f97004853c326e7120b9c62
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The embedded links suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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.
  • 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://trafftec.ru/aws?utm_term=sinhala+baby+songs+free++mp4 PDF link annotation
    • https://cdn.sqhk.co/tipefimex/jbicIge/dalerorivesuzeg.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/ihgjcif/sling_tv_2020_channel_lineup.pdfIn PDF document text
    • https://cdn.sqhk.co/safimowexaw/QieLjkf/smith_s_pharmacy_hours.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/906cbf9fa.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/kalite.pdfIn PDF document text
    • https://jesezexesupozor.weebly.com/uploads/1/3/4/6/134623998/a9e600daece70.pdfIn PDF document text
    • https://cdn.sqhk.co/fepogosu/iajhlhd/52458399888.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/T1uVd60/opm_30_days_challenge_weight_loss.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/zewuxopujiwixemivupu.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/33f71f54-e4ad-4c93-bde7-7972d27e5c5c/52491424630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66dac71e-f93f-444f-86b3-ab733bce3f9e/lutosok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a606fe-351c-4840-98d5-15c7124c58e8/86704225528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4be7b17-6a7b-40d2-8087-16e1e5712559/vizimijinaxadakan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce14265-8080-4358-b249-65e10873d91c/dermalmd_under_eye_serum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c970f29-237d-4a2f-8b85-512da69461e4/46813951919.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DF 5748 bytes
SHA-256: 212e36021adfc0fc0a1de65c1089ba5bc5b4ef62606e112fc20fab4c5a35a84f
font_01_sfnt_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 25976 bytes
SHA-256: 493f8f3d0db6e58fff5e04f7e7f5292a3fc39dd0346a1facce64d3df14152c74
font_02_sfnt_off00013d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9E 10844 bytes
SHA-256: 4e1f6b3aee9890e316c1dafec4396ae5bd930a3404f7c271a62b00e3949153f9
font_03_sfnt_off000162d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162D4 16064 bytes
SHA-256: 2e969934b98279dc8aea21a1cfec87ed8458c0d9985c5f19914d6fb4e2e0c341

Open this report in the interactive analyzer, or submit your own file for analysis.