Malicious PDF — malware analysis report

Static analysis result for SHA-256 008ca8a18ecd579e…

MALICIOUS

PDF

59.4 KB Created: 2020-12-01 19:23:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bd6c7880be44c1287bc359239119ede4 SHA-1: fe85cdf8cb097a83809f9660d78805623fca434f SHA-256: 008ca8a18ecd579ed1f27b5168d2965e8491d8bb69ce42bb520b70afeefbdef7
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. The embedded URL is designed to lead the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/123?utm_term=union+city+last+stand+hacked+unblocked In PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/6febba2b6.pdfIn PDF document text
    • https://xejibojap.weebly.com/uploads/1/3/4/3/134310503/lavutovela_tuguguvifenar_dagene_waxupurofalof.pdfIn PDF document text
    • https://menelaxewo.weebly.com/uploads/1/3/4/3/134362368/vonumo-fisubu-xeboxofezo.pdfIn PDF document text
    • https://zomutelisofo.weebly.com/uploads/1/3/4/7/134712892/tereluxifit.pdfIn PDF document text
    • https://sebijulevezokoj.weebly.com/uploads/1/3/4/5/134512917/55068.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/c8daa7ae.pdfIn PDF document text
    • https://dililoperajat.weebly.com/uploads/1/3/4/6/134631443/neramibixupi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03b09d104e5f152eb972/1606222768921/ray_diagrams_practice_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc042db8787e8798968ae67/t/5fc0fdafcb3e0f577172a2bd/1606483376607/kavuramiwigadizox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ef3116eb00e3c49974f/t/5fc20038cb3e0f5771967c66/1606549565036/nabelanorunaziretobiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/vampire_diaries_season_1_bittorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/angle_sum_difference_identities_worksheet_answers.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_off0000acb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACB8 5228 bytes
SHA-256: 569fdd87b4fb238d1a4e24ddb3f63cbd6586182355a133ae6e53af5982338230
font_01_sfnt_off0000be83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE83 10112 bytes
SHA-256: 88c689fe7ba6bbfd38254c5062922706a8aa7049748759139e5dbb6e9a3651ba

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