Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f372f4b73d61d5…

MALICIOUS

PDF

77.0 KB Created: 2021-03-30 09:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c44f6dd8f3f6bce90a42770c03fbd432 SHA-1: 8e8b96dfebff2b2c267955abcd0b7f2bd59a165a SHA-256: 72f372f4b73d61d5315350f96bf2c5699abb1c1373d74900a3c6fba5d178cfb6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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 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://kuzutuzo.ru/strik?utm_term=maytag+bravos+xl+washer+lint+trap PDF link annotation
    • https://rajopolaxobi.weebly.com/uploads/1/3/1/4/131406270/fea9b3f3c17b851.pdfIn PDF document text
    • http://bathforlegs.xyz/tevogotinuwz6vrv.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/learn_python_programming_step_by_step.pdfIn PDF document text
    • https://povaxabo.weebly.com/uploads/1/3/5/9/135976235/xejuxos.pdfIn PDF document text
    • http://mexawolin.medianewsonline.com/36270882875.pdfIn PDF document text
    • http://armlur.space/highway_1_closures_half_moon_bay7lyh5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484156/normal_604ce106aeef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_60379f0f6f099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_5fd9d60404797.pdfIn PDF document text
    • https://bolowotusupiwam.weebly.com/uploads/1/3/5/3/135300352/nezaxitudita_jepogeler_tobawatizef.pdfIn PDF document text
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/3d2b38.pdfIn PDF document text
    • http://vuzuvolumupapiz.22web.org/household_maintenance_list.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/dukavunivifa/cakephp_3_form_id.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/mibexunatuvaxijav.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/mepenuwafopokubududorodo.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/92027970419.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/78671106552.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/m-audio_fast_track_usb_audio_interface.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/the_prayer_of_jabez_audiobook_free.pdfIn PDF document text
    • http://witesibezixu.epizy.com/blender_tutorial_in_tamil.pdfIn PDF document text
    • http://veruzixiki.rf.gd/ebay_desktop_symbol.pdfIn PDF document text
    • http://kifemulawej.epizy.com/70459263551.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_off0000ec99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC99 5548 bytes
SHA-256: bfd596d89ef6d73149c9af6c46c82ce72290489014f57c2dcbcf2255bb1ad487
font_01_sfnt_off0000ffa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA2 10864 bytes
SHA-256: 6d4400c16253867e1d9d844949b4ac9d122fe9b0459d3dff51954e42c37aa46f

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