Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b286545e9e35b5f…

MALICIOUS

PDF

97.8 KB Created: 2021-03-17 18:27:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f74e58ce0e5e530bea9c5baf28ee8304 SHA-1: 9bbdd126855b2148b864aded84e8c77b65c83295 SHA-256: 2b286545e9e35b5f2582c90b4c2a8b269ecf57473c1695c6030abcf83dd1762c
186 Risk Score

Malware Insights

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

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 0.9965

Heuristics 6

  • 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.
  • 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://botokaw.ru/award?keyword=aso+exam+paper+pdf PDF link annotation
    • https://cdn.sqhk.co/xobanozizesa/uZahioy/craftsman_new_homes.pdfIn PDF document text
    • http://worldhold.online/renal_drug_handbook_appj8qcw.pdfIn PDF document text
    • https://wufanamokedig.weebly.com/uploads/1/3/5/3/135326106/zubonaren.pdfIn PDF document text
    • http://setofexperience.site/sapomiforunobuvaditurekaw7ni06.pdfIn PDF document text
    • http://prizyivnik.ru/25582942540oli1j.pdfIn PDF document text
    • https://cdn.sqhk.co/lunemitibojo/lhgtOge/autodesk_removal_tool.pdfIn PDF document text
    • https://filofasifujutoz.weebly.com/uploads/1/3/0/8/130874575/temix_volaxuvolemu_virukavemuze.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/fGpghgb/sagetubafelapubonaramefes.pdfIn PDF document text
    • https://cdn.sqhk.co/gutevazito/8ijxhiK/call_on_your_guardian_angel.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/jXv6O6s/14272082623.pdfIn PDF document text
    • http://kismykeitio.best/68653216285tqkv9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_601e33fbc43ba.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/idgiifp/financial_reporting_and_analysis_du_question_paper.pdfIn PDF document text
    • https://samalatedagunir.weebly.com/uploads/1/3/4/0/134040677/tilobifafir-tukulapuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/ijZj3ha/last_minute_hotels_deals_ireland.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482618/normal_5fc64369aea46.pdfIn PDF document text
    • http://tovelksa.website/jikefemerokafexupzhci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_60384562bac1a.pdfIn PDF document text
    • http://car-test.pro/programmable_logic_controllers_5th_edition_solution_manualqy6me.pdfIn PDF document text
    • https://rumodabumuxe.weebly.com/uploads/1/3/1/8/131857513/wirevokeziwepit_judeki_wunute.pdfIn PDF document text
    • http://businessoutsourcing.org/wesepedubiseqwp59.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/Ajj8eC2/kulokemotewonudetep.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/ehjHgfB/lepubidudaxawajon.pdfIn PDF document text
    • https://cdn.sqhk.co/wifilivemij/gpjajbB/dreamline_shower_pan_installation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF962 5212 bytes
SHA-256: b179b84dac443980a5337d826f5eb489cad8c674709624f9a303e976e9bc5657
font_01_sfnt_off00010b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B06 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0001166a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166A 11360 bytes
SHA-256: edd2b3e3d4844ad239fcad4b1b2aa8271be1eb4f507c219c5d9afea7e28e619e
font_03_sfnt_off00013d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4E 16112 bytes
SHA-256: da133098c8ec00180ce5fe37c74b807b143adc5860869a2f7b6211e455203b10
font_04_sfnt_off0001525b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1525B 12232 bytes
SHA-256: fc32ef598a71e36eea157a3b656e53c5277903dac735f2cd298de4558f71ea0e