Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f3ff8cc1222954…

MALICIOUS

PDF

92.5 KB Created: 2021-02-21 07:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 53a564f2e0e4cb0b8c4ebf67c51a4c70 SHA-1: 5f2b4172bcc95aae04ecfa7727759fea76539c3d SHA-256: 17f3ff8cc1222954aba21b7e9eb3d9031ed0f84f260d9fea0cbe45f00d433066
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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 https://crophysi.ru/123?utm_term=focusrite+scarlett+2i4+usb+audio+interface+%25282nd+generation%2529 PDF link annotation
    • http://it50disconto.pro/blazing_bagels_nutrition_information7jin3.pdfIn PDF document text
    • https://cdn.sqhk.co/xawenano/nigZ5e7/mine_survival_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/faY2OC5/36408433594.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/vmiabjb/ghost_rider_live_wallpaper_iphone.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/7336960.pdfIn PDF document text
    • https://cdn.sqhk.co/gabotewobe/ghgnjak/nat_geo_store_near_me.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/biwufukeduwewe.pdfIn PDF document text
    • http://dhl-order.info/rational_numbers_operations_worksheettxbkz.pdfIn PDF document text
    • http://virona.org/wugigiteseximez45sdm.pdfIn PDF document text
    • https://sitekitenuzuvi.weebly.com/uploads/1/3/2/3/132303150/ab655beccb.pdfIn PDF document text
    • https://gonadasefu.weebly.com/uploads/1/3/5/3/135345348/zokakukoj.pdfIn PDF document text
    • https://kalozepi.weebly.com/uploads/1/3/0/8/130814360/larobipebigowog-xober-kufonuziw.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/ggB2dRn/3307913225.pdfIn PDF document text
    • https://fifusikusivupe.weebly.com/uploads/1/3/4/6/134638905/749612.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/hbywC87/exterior_paint_sprayer_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/jcigEgg/disable_digital_wellbeing_android_11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012927.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12927 26156 bytes
SHA-256: e236d27a92407a02e73b523f900d32828f5bd539e48b4eaf93e1fc40b8953a8c
font_00_sfnt_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 5540 bytes
SHA-256: 9da97edf6de45f8bde1d643adcf80e04b06fed3e9a9b59c527a8f577d5ed5a4d
font_01_sfnt_off0000ffc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 12248 bytes
SHA-256: 9c4ba08d2579ecdb9099132a48ae1d60abbefd6e040e619b2632ef0eafcbf7a6
font_03_sfnt_off0001560b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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