Malicious PDF — malware analysis report

Static analysis result for SHA-256 618b284000854d89…

MALICIOUS

PDF

96.7 KB Created: 2021-02-19 08:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d042ead9a6014ab6fd3ef64e7bfb534a SHA-1: 7c2c6a99ca64a2192c5bc76e1e3058fa3b28548c SHA-256: 618b284000854d8935376be1b3afc2189708f69478b9881adde022765af61574
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Numerous embedded URLs, many hosted on disposable domains and employing UTM parameters, suggest a link farm designed to redirect users to malicious sites. The presence of these links points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=king+henry+died+by+drinking+chocolate+milk+song+flocabulary PDF link annotation
    • https://cdn.sqhk.co/jogepirar/KhfcigX/17770645070.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/heghxgf/61662163419.pdfIn PDF document text
    • http://arenaprobet.com/10691962319dp9rh.pdfIn PDF document text
    • http://allostar.buzz/zuvalegajupowufasrp40c.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/nifagijamu.pdfIn PDF document text
    • https://wotowabe.weebly.com/uploads/1/3/4/6/134688823/kaxepaxavivew.pdfIn PDF document text
    • http://lnstagramsupportlives.com/bowapujolaviwukk93x2.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/48cf2935.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/eXubhaC/you_are_god_alone_even_before_time_began.pdfIn PDF document text
    • http://all-system7.club/what_does_it_mean_to_be_submissive_sexually6h036.pdfIn PDF document text
    • http://nat-yoga.space/658248091730cfne.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/gdibkkR/cyclebar_membership_options.pdfIn PDF document text
    • https://mipolapepel.weebly.com/uploads/1/3/4/3/134395859/82516acb.pdfIn PDF document text
    • https://boferisavupase.weebly.com/uploads/1/3/1/3/131384298/8752535.pdfIn PDF document text
    • http://gooddevice-online.com/boneless_chicken_breast_nutrition_informationqu2w2.pdfIn PDF document text
    • http://shopsmmv.site/xenokosujavutugejesagojkfar6.pdfIn PDF document text
    • http://venira.su/komulotifodiwad3zu6g.pdfIn PDF document text
    • https://bumiwawewa.weebly.com/uploads/1/3/5/3/135343946/6933c2f.pdfIn PDF document text
    • http://price-list.moscow/hoops_walter_dean_myers_audiobookcmr5o.pdfIn PDF document text
    • http://shoop-fg.ru/marasijirugap3dxd.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/lusabifef/89356643921.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 5708 bytes
SHA-256: f46f2ca5b84b049a902655fcc2acee9d6018c51488394388305a958dd9e82da5
font_01_sfnt_off00010e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E97 6908 bytes
SHA-256: 8dcd9f27eb33dc1f92833a55d73a5e7a308bbc9120bf5672b7a42275d2bcc028
font_02_sfnt_off00012610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12610 17680 bytes
SHA-256: f1dfed40263f447186a0d71a3eefc136d7061c3867eeca75ec665b8bc95a8a79
font_03_sfnt_off00015c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C78 16324 bytes
SHA-256: 9a14c8c5c53c7b736491594d3c2de840a45b1caea17a7953cbc2e576f41b15f8

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