Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b52cfb41db133dd…

MALICIOUS

PDF

73.9 KB Created: 2021-04-24 17:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7fd49e116b5f7d4a449591ca0070c7c3 SHA-1: 87a4c81fb9608e4a05de4e3c242b5647e083336f SHA-256: 6b52cfb41db133dd23e86f488b7179048deded86c22181d7f6be02182b3cf916
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm or phishing campaign, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links point towards a malicious document, possibly a phishing lure or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://mezovuduw.ru/strik?utm_term=kitchenaid+artisan+stand+mixer+matte+white PDF link annotation
    • http://familyit.info/242037405145vfqf.pdfIn PDF document text
    • https://lejoxenususoja.weebly.com/uploads/1/3/4/4/134497781/deriz_linetofusitanuw.pdfIn PDF document text
    • https://vuxerapetu.weebly.com/uploads/1/3/4/5/134599288/lawugimipowelu-pegadiben-wutinepet.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/7525618.pdfIn PDF document text
    • http://redirunna.xyz/17316025374ykj6o.pdfIn PDF document text
    • https://mezinetoxapim.weebly.com/uploads/1/3/4/8/134887379/nafupitadavefab-mamipopopipovus.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/zidomawipepig.pdfIn PDF document text
    • http://salet.store/autocad_3d_bathroom_blocks_freeqcaqm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dezajok/13_sins_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/jasiditaz.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/pozaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/285622e6-1d63-4047-9ae5-b2fdd93f46da/harry_potter_butterbeer_recipe_alcoholic.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/best_steam_mop_and_vacuum_cleaner.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/tifox.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/60519464306.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/street_fighter_4_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/34122885788.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/tazos.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/gonorrhea_guidelines_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d22344-9386-427d-af92-a5af6ac561ae/4992907603.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/kapojajufe.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1B 5276 bytes
SHA-256: fd7f34ff1a5acfcb3d8f25a19f6d9913d5cc7e7ed370a0cc94b21daef9e973c3
font_01_sfnt_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 11984 bytes
SHA-256: e6ecdb40c6b4d5678ff8e73817e21ab658c8e5a99bb19642e23d68d034ea7750

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