Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6875de154c353c…

MALICIOUS

PDF

77.6 KB Created: 2021-03-20 03:28:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 43df4966d4f9f8fae209a75c4c980d85 SHA-1: 6c9e05e10041f516818ccfb22588f745e4f226c9 SHA-256: 6f6875de154c353c097f51e44711532d66146bbdfb15fa8783f2d1ace7101d72
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=tinkle+double+digest+free+pdf In PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/catalogue_sino.pdfIn PDF document text
    • http://akmurzina.com/tafisutapirobobenuxeae54u.pdfIn PDF document text
    • http://dress-russia.ru/rubber_mixing_processo0t4m.pdfIn PDF document text
    • http://kenaxifinot.22web.org/36786440006.pdfIn PDF document text
    • http://precabinets.xyz/what_is_a_pre-_sentencing_report_hearingau3yh.pdfIn PDF document text
    • http://betmoy54.com/iam_751_boeing_collective_bargaining_agreementr8skq.pdfIn PDF document text
    • http://grigolia-studio.ru/lupaxuxivcnxhb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ropupifalapoges.atwebpages.com/xolubasomufirepusixeleli.pdfIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/sijalimowoduw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea1f999-a63a-41b5-b968-9b453bc58ccd/shooting_an_elephant_significance.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/honda_100cc_dirt_bikes_for_sale_craigslist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d7e367-e983-4a0e-a21a-fb37bcd72edc/tetorebizapagipifapul.pdfIn PDF document text
    • http://babupit.epizy.com/41245436000.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/afficher_les_formule_dans_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90363ba-c225-4bda-960f-bdd05fcafeed/mopunogov.pdfIn PDF document text
    • http://jekogowe.epizy.com/rodizopuvunawid.pdfIn PDF document text
    • https://c4fca8c4-0f54-45c3-ae88-320069d86c16.filesusr.com/ugd/ac0d21_a1378c24913e43698a46e74e6167b7d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/analog_video_signal_format.pdfIn PDF document text
    • http://nekepozime.epizy.com/how_to_connect_a_plantronics_bluetooth_headset_to_a_computer.pdfIn PDF document text
    • http://sadenadatideb.rf.gd/ruwemunoxaxune.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_2cc5ec7956e94c519bc5f7ec07d4182c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/rspca_wales_report.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/4084985374.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_off0000f006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF006 5152 bytes
SHA-256: 08e8dbdef1709c508fae767d4c0b905cd3945ca8e2d0b74860f18c50cc09bbbb
font_01_sfnt_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 11000 bytes
SHA-256: 3bba19b5dcbae2635ae756195ef5634967771a197fe45340fdb9c49620aeff4c

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