Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d115cf906fd41eb…

MALICIOUS

PDF

66.4 KB Created: 2021-04-28 20:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5bdea257037354ff816b77f4bad17f50 SHA-1: 657f56ece969e5dfa4ba5aae723f25312de2d3b1 SHA-256: 6d115cf906fd41eb5fef4d9ebb3ba76afc24659d67929ffcb5ac6e462b9ce069
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=ps3+controller+mit+amazon+fire+tv+stick+verbinden PDF link annotation
    • https://cdn.sqhk.co/jarixizotib/jd7gepH/launchpad_lee_county.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/icom_ic-718_price.pdfIn PDF document text
    • http://yildirimotobursa.com/zemawikumetw1.pdfIn PDF document text
    • http://sexesex.site/fowujojogavibumufivung3ma1.pdfIn PDF document text
    • https://mejapibidar.weebly.com/uploads/1/3/4/3/134315264/tovum_jujefowuvif.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/2909495.pdfIn PDF document text
    • http://sevastopol.sale/easy_crochet_patterns_for_beginners_tutorialuvs4e.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/pibanekujelegesim.pdfIn PDF document text
    • http://jelolizabuvixi.22web.org/how_to_make_money_from_home_legitimately.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/eHCLcDd/how_to_dig_in_ant_simulator_roblox_mobile.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/how_do_you_write_a_performance_improvement_plan_example.pdfIn PDF document text
    • http://wodunobogigav.22web.org/konedebetun.pdfIn PDF document text
    • http://dejivuxa.mygamesonline.org/english_grammar_for_class_2.pdfIn PDF document text
    • http://lopitimew.mygamesonline.org/faregovujewetitefaxa.pdfIn PDF document text
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/9569092.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/hfhe2cq/fashion_inspired_girl_names.pdfIn PDF document text
    • https://cdn.sqhk.co/xusikeko/iifPibl/75303140481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_64d630de452c45ba935ef6688a1640f1.pdf?index=trueIn PDF document text
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_31c3fa9f672e49c18e86e696be9c3b6d.pdf?index=trueIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_4484546b24e14873990abcea1fc4ba40.pdf?index=trueIn PDF document text
    • http://buketoxepebaf.epizy.com/42990497658.pdfIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_7a1090c71ce24aadb90a0558421a4b53.pdf?index=trueIn 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_off0000c399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC399 5644 bytes
SHA-256: 940209aecbd19f9ebefde8a24371ceac15cae15e95c5de221e48a15897b42eb8
font_01_sfnt_off0000d6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 10416 bytes
SHA-256: dc893acaad386898adc5445b059336315e45de111fbb641e75685d78931fa5f4

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