Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8faf57293cc69f…

MALICIOUS

PDF

109.1 KB Created: 2021-03-19 23:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38ce39bf844b8aced382ce4c43cb0a02 SHA-1: c8b5d9724fbe9043dea955cdef264d88bc2106c0 SHA-256: ab8faf57293cc69f50438716b2fc689f7e15b8495f54cccb0b27ecea8a4eb7d2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The primary URL, 'https://resalured.ru/wix?keyword=diablo+2+character+save+location+windows+10', suggests a lure to a malicious site disguised as search results. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=diablo+2+character+save+location+windows+10
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/5ef8e5e4d4820.pdf
    • https://cdn-cms.f-static.net/uploads/4444377/normal_6021a80a827b5.pdf
    • https://cdn-cms.f-static.net/uploads/4393638/normal_6015ca699a5a9.pdf
    • https://static.s123-cdn-static.com/uploads/4417645/normal_6006f7351c687.pdf
    • https://cdn-cms.f-static.net/uploads/4411919/normal_6017aa209f01d.pdf
    • https://rokelabik.weebly.com/uploads/1/3/0/8/130813827/1834692.pdf
    • https://lijogidatu.weebly.com/uploads/1/3/2/3/132303170/592235.pdf
    • https://static.s123-cdn-static.com/uploads/4370309/normal_5ff5004a16e6a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/satudifin/kreg_router_table_insert_template.pdf
    • https://s3.amazonaws.com/xafaxotaful/cap_guidelines_idsa.pdf
    • http://nisexugolozefa.rf.gd/33979831741.pdf
    • https://uploads.strikinglycdn.com/files/7a828ca3-99a3-4111-b690-e339aac92ff8/briggs_and_stratton_18hp_vanguard_fram_oil_filter.pdf
    • https://s3.amazonaws.com/najubu/24540784993.pdf
    • https://uploads.strikinglycdn.com/files/700a1e4a-5117-437a-85ef-92538f4efbf1/xajevatodiwiwuxeleloxeno.pdf
    • https://uploads.strikinglycdn.com/files/41ddbdf4-fa5f-44fc-bcfa-a4672fe03c0f/pretty_little_liars_season_1-6_recap.pdf
    • http://fumexilali.rf.gd/91556483386.pdf
    • http://povivubezili.rf.gd/flow_cytometry_procedure.pdf
    • https://uploads.strikinglycdn.com/files/3fad01ee-1dcf-4cc1-a272-f8e19e872d53/33773685423.pdf
    • http://gowamatul.epizy.com/76386260595.pdf
    • https://uploads.strikinglycdn.com/files/cce79f9b-5e56-4a02-9699-b2ffeec2561f/riboleviporuwonagi.pdf
    • https://s3.amazonaws.com/nagudo/tevuwemegepowo.pdf
    • http://fazafof.rf.gd/99559166514.pdf
    • https://uploads.strikinglycdn.com/files/cfb3f309-4073-4f11-91cf-8b7358c2d25e/what_is_the_definition_of_biblical_hermeneutics.pdf
    • https://uploads.strikinglycdn.com/files/f4af9614-986b-4418-9d66-47ec5572ef88/braun_series_7_shaver_7840s_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016bf4.bin
8fabb4725c0ece8ea18ba4125f5633c1113be7e8c809df52ba15575e7d0f6bd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BF4 5644 bytes
font_01_sfnt_off00017f3c.bin
8eaed589adb2b14d5875deae51aeefcb1f0b95d8695ceccd054151f00cebb6e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F3C 11468 bytes

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