Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cce16feacc8c3f…

MALICIOUS

PDF

105.3 KB Created: 2021-04-03 18:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 49a00653b4789c27f7aee03a7339ad89 SHA-1: 55c5e17fa6d2f652a65f7493c1b0207421bfdff1 SHA-256: 00cce16feacc8c3f901993924a804ce0dd83a66df5416d8b15f2cf7a73455c7d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are generated to appear as product manuals, indicating a link farm or phishing lure. 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 numerous external links point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pelibifir.ru/wix?keyword=delonghi+pac+t140+hpec+manual PDF link annotation
    • https://cdn.sqhk.co/wazotifuk/SibsUiE/13769671758.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/d20pbhj/66493679622.pdfIn PDF document text
    • https://lexigeme.weebly.com/uploads/1/3/4/5/134524735/wunorivikewuf.pdfIn PDF document text
    • http://losinglotterynumbers.com/tuvitijawa7gb3q.pdfIn PDF document text
    • http://probmake12.xyz/chicco_keyfit_35_infant_car_seat_safety_ratingp3172.pdfIn PDF document text
    • https://sazotavivi.weebly.com/uploads/1/3/1/1/131164406/dujakawavisiwazom.pdfIn PDF document text
    • https://gutototuwasikik.weebly.com/uploads/1/3/4/8/134876789/pamowoj.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/bhhYjd2/51541183168.pdfIn PDF document text
    • https://tozadifoxu.weebly.com/uploads/1/3/4/9/134904498/003ce5adca58.pdfIn PDF document text
    • http://inmyshtangen.xyz/maplestory_m_buccaneer_skill_guiderosd2.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/irgjpon/kpop_popularity_ranking_2018.pdfIn PDF document text
    • https://fekagisikazepi.weebly.com/uploads/1/3/4/6/134680816/mavifotutuxow.pdfIn PDF document text
    • http://mnogoturov.com/taneturegifodozotinoserofmf611.pdfIn PDF document text
    • https://cdn.sqhk.co/zadexona/dhgic1R/78807370640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gedexim/82553206802.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/dc_training_log.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/99041174527.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/online_converter_jpg_to.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/hershey_bar_wrapper_template_for_graduation.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/68395325697.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/velojojuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/mcgraw_hill_wonders_1st_grade.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_off00015ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DED 5356 bytes
SHA-256: df0145a442475c33c4121786740fff4b352f8f7bac5f5eb54e4045369a466c83
font_01_sfnt_off0001700d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1700D 11396 bytes
SHA-256: 501571188da02c2467b1e5949b50e00d435807a538084d9f414b5c4cadfed61e

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