Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be9c8583bb03a07…

MALICIOUS

PDF

74.7 KB Created: 2021-03-01 21:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5a44fafb8c7be1822b6b306deb3852b9 SHA-1: 1d6424ec2f9feac2736361de8a15cd1c974548e5 SHA-256: 4be9c8583bb03a07d9d7990e5e4c18afd81706f53c6118d7c5b9b75fb87b8030
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to 'fokemale.ru', which is indicative of a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious intent to use the document for SEO manipulation or to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/wix?keyword=kilometro+31+cast PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5fef176848834.pdfIn PDF document text
    • https://cdn.sqhk.co/rusukumuva/dsqjeji/vuvufoxaba.pdfIn PDF document text
    • https://cdn.sqhk.co/xupasutejos/PjehhlL/61514862127.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5ff16d1be1aac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_6026d315ea226.pdfIn PDF document text
    • https://cdn.sqhk.co/pozusonitid/ggifvtW/road_rage_meaning_law.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/hgfijJw/tarisuzolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fca63d6990c6.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/3129746678.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/how_do_you_fix_a_bose_multi_cd_changer.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/wapabefizosumi/assoluto_racing_hack.pdfIn PDF document text
    • http://zikepodaw.epizy.com/merriam_webster_dictionary_apk_for_pc.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/54125183574.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/food_and_beverage_hd_images.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/likepakikuv.pdfIn PDF document text
    • http://fofomekurun.rf.gd/optiplex_790_release_date.pdfIn PDF document text
    • http://lawubipala.epizy.com/telewolisezifenixuxilusi.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/21879543630.pdfIn PDF document text
    • http://dedetepejoxele.epizy.com/13127515115.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/beowulf_full_movie_hd.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_off0000dad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 4812 bytes
SHA-256: 1ef790dd383d1b862bdd7c99d29d5ddbde7168ceaa60dfff4f6f3a579d1276f7
font_01_sfnt_off0000eb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 10532 bytes
SHA-256: d3605b57e5b444881977943509a8d85f51616fc01b7bb4986df4b033acca25f1
font_02_sfnt_off00010f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F40 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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