Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0ea320f67ce720…

MALICIOUS

PDF

81.6 KB Created: 2021-03-07 22:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8d00b6df3fa226ce3f94393bd6eb67ab SHA-1: 793bc0ea709c2cbb02489cd053a10b219de0fea4 SHA-256: ab0ea320f67ce720eae3ccac13915bbd63db3f1668dda64d806e8e87e1d81686
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/aws?utm_term=surface+area+equations+for+shapes PDF link annotation
    • https://bativazuwa.weebly.com/uploads/1/3/0/9/130969541/xifava.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/hbmSppE/gutarazaziki.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/7LoV07Y/4321360422.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/1075620.pdfIn PDF document text
    • https://bunoworerut.weebly.com/uploads/1/3/1/4/131438217/f23aed73.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/f5Nu8gc/pabejozonugevupazusom.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/vigazojemifaza-sixepaluv.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
    • https://s3.amazonaws.com/jewizopukuni/netgear_gs108tv3_poe.pdfIn PDF document text
    • http://kaxozofevaz.epizy.com/41263871661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b982b0-17b4-4b96-8d25-8a5de61ff94d/78138404356.pdfIn PDF document text
    • https://60ceb029-6f78-4d42-8ea4-15ca08d8077a.filesusr.com/ugd/857e61_d191107802f144aa9fa0af83972af882.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/291df225-eb0c-4dda-ba81-16888c554c19/rajikisapa.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/20703365240.pdfIn PDF document text
    • http://wufajin.rf.gd/60104759536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3d38b7-5f02-4b3e-93e3-bd6709c8a7b4/how_to_use_salesforce_for_beginners.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/cartoon_video_game_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09df70b5-c2d6-48b0-b903-d29d63c2b693/a_night_to_remember_teacher_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f15a7b8a-2b0e-47ad-9fea-909040fd3630/most_common_complication_of_acute_mi.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/vmware_esxi_6._5.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_846650a3549b432ca4e073f2cbd2e620.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupimaral/gebitegeveworokexusojafow.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_341a8d5dd5ef47d39720d61067c25389.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/1956028955.pdfIn PDF document text
    • http://lirepotinemos.rf.gd/star_wars_thrawn_alliances.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF125 5180 bytes
SHA-256: 9cb1b2db1311fbf97fce3093402dca38c4fbdd8571dfd958b92c55d6db6d7fbd
font_01_sfnt_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 11520 bytes
SHA-256: bd9c96e257b031f3235cf605d4d07de56503a2cf805d2f4ab57a513a15dfbec8
font_02_sfnt_off00012a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A35 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176