Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b64be2207ed72a0…

MALICIOUS

PDF

80.3 KB Created: 2021-03-27 19:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d4e16def828ff7a5bb88275f2ef62277 SHA-1: c89ac704b39aef91de577c1af4bf30dc0ad345a0 SHA-256: 7b64be2207ed72a0cbfe4c8745e23d292302b177fc5ecef72e887af7d48194f8
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 0.9997

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://golowaki.ru/wix?keyword=fitbit+manual+versa PDF link annotation
    • http://skywonder.space/mmd_model_maker_downloadtzltj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406229/normal_5ff66ea9e89ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_5fe99577af40e.pdfIn PDF document text
    • https://cdn.sqhk.co/tojofelekob/Hiarsgg/movezijakebirebakexizedi.pdfIn PDF document text
    • http://salebox.shop/jizivonasogelaviw0pmtd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403824/normal_5fee505c5391d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_6031622f4d8cb.pdfIn PDF document text
    • https://cdn.sqhk.co/luvafuza/gXhaIhc/rokezab.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/jhjjyhd/pigolegasewavazoxilanasa.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/ibibAgf/fexuletafuxifewefowekowap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408001/normal_6043bac4c52bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408001/normal_5fec7616c5c2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385424/normal_5ff34017bf8ad.pdfIn PDF document text
    • http://sosed.market/what_is_inchoate_offenses_lawbt2h7.pdfIn PDF document text
    • https://cdn.sqhk.co/pegatorapo/hbjgXib/94261776482.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/jejulurowev/20719862837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0c8a65-aa28-45b1-986b-c1696e524de9/why_i_want_a_wife_by_judy_brady_main_thesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f370c520-04c5-4163-bc38-c0f47d5ca908/modern_chemistry_chapter_6_test_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/dovekak.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/lotimitesuvivuv.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/texoxuminokepof.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_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 4984 bytes
SHA-256: 3a6d4b20b1377829fbd8f4cda8f01f66dd1a27bc9890d5e174a002bfec12b01f
font_01_sfnt_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 11088 bytes
SHA-256: d4f6adb10f24536b29ad40bbb6e987ddd0d3fd65898fe59c484a30b6fb55efe9

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