Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec832ec2f37d157…

MALICIOUS

PDF

86.3 KB Created: 2021-03-20 12:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9e4ae63c823be306e46c8e336145b1c2 SHA-1: 516534958e79f37e24fabe0c77cf3abee3346cbf SHA-256: aec832ec2f37d157ceffe9a73bb1d0ffbbafc50c88d21908e5e6d96350c93597
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 0.9994

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://xajibur.ru/wix?keyword=the+grappler+mid+south+wrestling PDF link annotation
    • https://cdn.sqhk.co/kezomerameki/fBJiaO6/20194781465.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/mechanical_actuators_types.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/hijfjhz/12938754625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413008/normal_602b8a8c11ab6.pdfIn PDF document text
    • http://rowefuzoj.mygamesonline.org/xurageka.pdfIn PDF document text
    • https://cdn.sqhk.co/gazamara/Baqv4hj/wallpaper_hd_happy_new_year_2019.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/jixalajoviwudotu.pdfIn PDF document text
    • http://konujojijitezu.iblogger.org/chesapeake_beach_pier_fishing_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_604f858f73434.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/mideraxa.pdfIn PDF document text
    • http://wutopezogegusi.getenjoyment.net/65418355572.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/fVYjhju/latest_bollywood_movies_2019_site.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/o0iEGgc/44823317101.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c6eab0-37fb-443b-87f1-71cae7a4cdb0/what_was_the_purpose_of_the_constitutional_act_of_1791.pdfIn PDF document text
    • http://jajoxutevo.epizy.com/xejavuzisometanorinipoj.pdfIn PDF document text
    • http://depegiwisa.epizy.com/aduro_hybrid_h1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/que_es_auditoria_informatica_de_seguridad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1d8816-df9e-4676-ba4b-694fddcef842/kidone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd03276-6916-4f75-9b2f-f7053b962b72/singer_golden_touch_and_sew_750_review.pdfIn PDF document text
    • http://kibululugavi.epizy.com/12788279818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/206feb35-0196-4ad7-a920-bf14a858c85c/nusomunokif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a860466-c14c-490b-a2ee-6b33e75595ff/how_to_make_a_simple_toga_for_a_child.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/student_registration_form_css_template_free.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_off000114c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C9 5416 bytes
SHA-256: a75ce398207cd9fd7d0fa6ac0a2303ca687ad024e0e219fedeb9f6183c6f0cdf
font_01_sfnt_off00012716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12716 10764 bytes
SHA-256: f5c8a431f9e72f6b0c848b54fd7404d91e400945542fe191abaf4bcd7a376ac2

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