Malicious PDF — malware analysis report

Static analysis result for SHA-256 2282c773df2ca2c3…

MALICIOUS

PDF

90.2 KB Created: 2021-03-23 13:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e693b9c0317d376c896c66e7824af3a SHA-1: 1d1af0af54694ab0e97cd06ae5dde944de703dfe SHA-256: 2282c773df2ca2c314a2a0403f857c864fcf99fc24e4903f3c797e16e00be4fa
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 0.9850

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://mezovuduw.ru/wix?keyword=french+cursive+generator PDF link annotation
    • https://takoremitivo.weebly.com/uploads/1/3/0/7/130738963/totefuwi-dokoxez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477635/normal_6040e92432c38.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/iggjib2/bapagugurimewex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_600fac9d651ea.pdfIn PDF document text
    • http://uscarins.info/mifujikavadibuwizayyawc.pdfIn PDF document text
    • https://cdn.sqhk.co/pijovowifil/XUjcid8/fun_things_to_do_in_philadelphia_nightlife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_5fe8f102bfc30.pdfIn PDF document text
    • http://lnstagramcentre.net/fresh_wind_fresh_firepkcjm.pdfIn PDF document text
    • http://ighelpcenter.xyz/lukovasolkcja4.pdfIn PDF document text
    • https://wewopamutufufo.weebly.com/uploads/1/3/1/3/131398135/03466e6541ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_602479b77df40.pdfIn PDF document text
    • http://domainlimax.xyz/zazezixutiwixixobejatodgw5uk.pdfIn PDF document text
    • http://ita-bio.space/vexawuqhegq.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/Whdc9gi/cafe_racer_leather_jacket_brown.pdfIn PDF document text
    • https://cdn.sqhk.co/nomowaxiwo/jigiihg/pifefitoke.pdfIn PDF document text
    • http://tibetterrier.ru/we_were_liars_spoiler_review8nkyd.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/5432597.pdfIn PDF document text
    • http://draiwenstore.online/79621720683vse3a.pdfIn PDF document text
    • http://lixuninipakimar.iblogger.org/bozisinujinuwerat.pdfIn PDF document text
    • http://khareedforosh.com/how_to_clean_ge_profile_microwave_filterrgu97.pdfIn PDF document text
    • http://vemafenuxaj.22web.org/bibuvuf.pdfIn PDF document text
    • http://kuriwuvoke.22web.org/vogevezudebevidabosegiw.pdfIn PDF document text
    • https://fonamajubeb.weebly.com/uploads/1/3/4/4/134474676/4958558.pdfIn PDF document text
    • https://kaseloguxov.weebly.com/uploads/1/3/1/4/131406527/bikadofuwituw_zawinumigele.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/fRhdOne/patatilulelujevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roboketisi.rf.gd/what_is_the_intellectual_property_law.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 6632 bytes
SHA-256: e827e6478c89492c7708f37fa1bec84df41cd96b7c6958e40dbd7376689e68a1
font_01_sfnt_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 4388 bytes
SHA-256: bc25217838716820aa2cba11fe01078bcac2649869583b42539e551c78728967
font_02_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 5044 bytes
SHA-256: f33bbda062e5c55614d7e460eb8d57ca764be5c7bd9995804776814355b6a900
font_03_sfnt_off000115c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C7 2504 bytes
SHA-256: 2b4976bd5700831a6739eb7f99079ca960227e63ecdf520b00463d8acf8bf440
font_04_sfnt_off000120ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AE 10392 bytes
SHA-256: 127ec9dfad237c17c105e83b5142fce7a31d6ab4361783db9e940a209117a44f
font_05_sfnt_off0001444e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444E 16168 bytes
SHA-256: a0f7f72fa764e72e70a118f0665c7c51752733e3b3f4944635a3b97eaa8e5d3e

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