Malicious PDF — malware analysis report

Static analysis result for SHA-256 17490e0e86933216…

MALICIOUS

PDF

78.4 KB Created: 2021-03-25 01:28:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 096d633a39cdfe94d1a14df1be1c9bad SHA-1: 56018677b902cf2617ed26221775591e6add2040 SHA-256: 17490e0e869332167afa9090961f5bb2ae94aed3d59f2606cfc324dfe3a55e00
126 Risk Score

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 0.9991

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 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://ponafet.ru/award?keyword=canadian+citizenship+practice+test+by+chapter+pdf PDF link annotation
    • http://maslovauto.ru/nulemuxoc2i2.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/46647801310.pdfIn PDF document text
    • http://penaxuwilamufo.iblogger.org/84451197365.pdfIn PDF document text
    • http://chambreapp.xyz/skyrim_best_build_for_beginnerspexgi.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/briggs_and_stratton_engine_instruction_book.pdfIn PDF document text
    • http://dihtyar.online/raste_raste_chalti_banasa_song_audio6yahb.pdfIn PDF document text
    • http://dabosesavedevet.medianewsonline.com/gazumukuwefepivilep.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/ef6d8493-2fa2-41bc-8a4b-cce2fcfbeb49/bemazoter.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_0e3ee99113054b7faff922fb5c959f19.pdf?index=trueIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_1b8b808df6b44eb1b6035a6528e67242.pdf?index=trueIn PDF document text
    • http://satelogagolibo.rf.gd/mozabujokapeze.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_63b14804efa74facbe2e8db5635c6969.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gekojulog/21199519599.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/five_marketing_concepts.pdfIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_2719673ca14440099d3c2a8075a099d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/647fa95f-2082-4afe-bced-8042330c70d2/dazaraj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d193d2d7-5bbe-47d6-aeed-dea27c3d38b8/the_master_key_to_riches_ebook_free_download.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/putuxegatemepime.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/ark_survival_evolved_mobile_guide_for_beginners.pdfIn PDF document text
    • http://lojiwifi.epizy.com/66536176835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f88bf46-9016-4ba9-b0b9-dba78aac5e5e/85884684271.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/marketing_plan_outline_template.pdfIn PDF document text
    • http://luwemazezabubat.rf.gd/pitifod.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/86912807451.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_off0000f043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF043 5408 bytes
SHA-256: 117a28a9153cf037c51b3dce64ee4a5d6631d757e5debb8f53ced6e18b80770c
font_01_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 11532 bytes
SHA-256: 4e05e42f26c0ad922fcb20906ba378959ced10238bbf72f68cf6c40d899211bc