Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a80fe9178cc0efc…

MALICIOUS

PDF

99.1 KB Created: 2021-04-05 08:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0a52c939eb551c95b89f103d06742e4e SHA-1: 0a8aba9e509b065ebbd986adaffac6566ec2cdec SHA-256: 2a80fe9178cc0efc86fce19d0270796052fc1a9e74540c58b044e0031f136d65
146 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the document prompts the user to call a phone number. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to deceive users into engaging with fraudulent services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/strik?utm_term=tipos+de+sistemas+dispersos+en+la+basura PDF link annotation
    • http://reduslimitaly-ufficiale.site/ragijesomupetitezooahl7.pdfIn PDF document text
    • http://allrecipes.pro/546615355301d7uv.pdfIn PDF document text
    • http://sweetygirl.club/change_din_song_kambiffogt.pdfIn PDF document text
    • http://sojarenenu.iblogger.org/tesis_de_administracion_hotelera.pdfIn PDF document text
    • http://kemytbok.xyz/how_to_draw_a_turkey_using_hand45ofe.pdfIn PDF document text
    • http://wefitibugajax.iblogger.org/q_see_pen_camera_manual.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/muledotagazibarukijjtyss.pdfIn PDF document text
    • http://disclosures.space/661076802226fprx.pdfIn PDF document text
    • http://promoocaoameericanas.com/anthony_robbins_livros_downloadr30tm.pdfIn PDF document text
    • http://philonio.online/optimum_channel_guide_edison_njlln04.pdfIn PDF document text
    • http://redtea.space/sadokosasasusetijex3vf.pdfIn PDF document text
    • http://rufikive.iblogger.org/zufoxovudezedanasixof.pdfIn PDF document text
    • http://cosmeteca.com/stormblades_mod_apk_1._5._0zv0qw.pdfIn PDF document text
    • http://canonsburglake.org/franz_kafka_the_trial_reviewru91l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rifezovepon.rf.gd/26722410672.pdfIn PDF document text
    • http://fuvulubele.epizy.com/does_babylon_still_exist_today.pdfIn PDF document text
    • http://guvugapezo.rf.gd/club_car_precedent_parts_list.pdfIn PDF document text
    • http://budokukikaririd.rf.gd/dotafigejajawilesejaf.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/what_kind_of_charger_does_jitterbug_phone_use.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/old_yeller_dog_cast.pdfIn PDF document text
    • http://jiforexawa.rf.gd/vumojobopebowa.pdfIn PDF document text
    • http://fafovinipola.epizy.com/bapoxuxa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A4 5196 bytes
SHA-256: 9fcc2bc68947f17260b837b4c885e3e9f675eedc16fdeb8d6f8be99455f3e651
font_01_sfnt_off00012224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12224 2256 bytes
SHA-256: 8be9ef4a2694845cc149291ed280913bd75b50a3aadbdbd09edcd10d963e5ca2
font_02_sfnt_off00012bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAC 13196 bytes
SHA-256: a718c7e0040a455cc00903a3e4423045211472f2f2a317ee43b0a8aaf4612d90
font_03_sfnt_off00015637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15637 16284 bytes
SHA-256: dcca4db3e3dbbf5341926616348e12af223d5d0dd68ef34fd0b2a009ca7ddf33
font_04_sfnt_off00016bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BD1 6516 bytes
SHA-256: 9290bed359a64fdb24d126c8fce2bdcd083ab884557149515b2567dcfa0645a5