Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ca7099b3c94357…

MALICIOUS

PDF

96.0 KB Created: 2021-01-19 07:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a2ebbd3caf3067eb8932939a8f814786 SHA-1: 85d267cfa153685519ac7fdfd254fe6f8637d9ef SHA-256: 71ca7099b3c9435770079b9dbe9092f09253bb624c04c4e158e7d76f96f5269a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The primary malicious URL is trafftec.ru, which is likely used to direct users to potentially harmful content or further phishing attempts. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://trafftec.ru/123?utm_term=if+i+did+it+confessions+of+the+killer+pdf PDF link annotation
    • https://duvirimak.weebly.com/uploads/1/3/4/6/134603536/wirofedugatel.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/934073.pdfIn PDF document text
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/5e0b82cfd2287.pdfIn PDF document text
    • https://babobulelemin.weebly.com/uploads/1/3/5/3/135344535/nunanonulevugaz_jolupuzeko_vepopuwu_zuvapemobi.pdfIn PDF document text
    • https://xavedogaw.weebly.com/uploads/1/3/4/6/134659805/gukevadebenijumibik.pdfIn PDF document text
    • https://gogipemefa.weebly.com/uploads/1/3/4/4/134471158/0e44713d3a900.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/9979177.pdfIn PDF document text
    • https://kemovovem.weebly.com/uploads/1/3/1/4/131408999/xulaje-vabodefeladaz-mododiwejujif.pdfIn PDF document text
    • https://migusubab.weebly.com/uploads/1/3/4/8/134849844/zafewuladovav.pdfIn PDF document text
    • https://wokenapojazud.weebly.com/uploads/1/3/4/7/134753840/6b54c26562e6c.pdfIn PDF document text
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/tafum_keginixi_bazokebuwebo_buvoxiroruwow.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/nisiwanolom/frozen_shoulder_syndrome_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/pelaxebulesobek.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/free_birthday_party_invitation_templates_for_publisher.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/asterisknow_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/aerolineas_argentinas-_horarios_vuelos_a_formosa.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/logic_games.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_off00011b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9B 5032 bytes
SHA-256: eb2641c073646f64c6854be44db1b0c2f83507289935c8919851e0684593102c
font_01_sfnt_off00012cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB6 1964 bytes
SHA-256: 6df601e85dfc90c946656797585dc8da0f3a5ae40063fe0974a1ee9a87c26c9f
font_02_sfnt_off000135c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C0 11184 bytes
SHA-256: 77e03fa218f8b5a5cea37010d8d007beb51461f4b869ca7939cbc9f36e35cfa9
font_03_sfnt_off00015c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C1E 16428 bytes
SHA-256: 10ae7a4fbc5827eca3bc9db17f6834b346abd083628d2a1846ffe091fb3520f2

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