Malicious PDF — malware analysis report

Static analysis result for SHA-256 4337609038effb06…

MALICIOUS

PDF

85.2 KB Created: 2021-03-20 17:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d0741ea179eafbb37f8ed0dd6b1ce2c0 SHA-1: baca7366699289de6c1c1d1649f3bf66256be096 SHA-256: 4337609038effb063109334c277b594fd4733eb988d0b9ba070a16e4c763ed26
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a specific heuristic identifying it as a link farm on disposable hosting, pointing to suspicious domains like pelibifir.ru and blablablacar.online. The presence of these links suggests an attempt to direct users to potentially malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/123?utm_term=uniform+motion+acceleration+time+graph PDF link annotation
    • http://blablablacar.online/chicago_style_of_quotationmx9bf.pdfIn PDF document text
    • https://gezanexeroviku.weebly.com/uploads/1/3/4/7/134756427/dotijiwadebufen_rofojopujata_vixekonaj_savonupa.pdfIn PDF document text
    • https://sigibemora.weebly.com/uploads/1/3/3/9/133986782/383782.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/pidukazuninofara82g.pdfIn PDF document text
    • https://tibuvaji.weebly.com/uploads/1/3/4/7/134720571/d4d95aaed2490.pdfIn PDF document text
    • https://zogadinarele.weebly.com/uploads/1/3/1/4/131409244/4152d9e98d.pdfIn PDF document text
    • https://gojulujowavid.weebly.com/uploads/1/3/4/8/134886085/7056011.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/wetevali/nilajubikefatejut.pdfIn PDF document text
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_beeba92b397d47faa76330943956b315.pdf?index=trueIn PDF document text
    • http://fiforeru.atwebpages.com/indian_instant_pot_cooking_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72317a9-7158-41ec-ac0d-3fc458703a8e/kefobuganijunadanafujoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fabad7b-5ea7-4008-8e36-7902715ec8fd/oppo_bdp-103d_manual.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/50442372342.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/ketizumiwunitibanu.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/can_you_use_itunes_on_android_phone.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_1153ebf428fb46ee9eb65337161d4282.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mamibis/yellow_coldplay_sheet_music_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC45 5240 bytes
SHA-256: 819cedf093681fcf3a702be803b9de6b96c0f2a942b50ba04bea819b87b38fd2
font_01_sfnt_off00010dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEE 10700 bytes
SHA-256: 28fa4e215b74f6256848cb852de872d552c59140d56728fac015a1ca58727e23
font_02_sfnt_off000132aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AA 16076 bytes
SHA-256: 2e8947c527022c2777c705293212bdbe99a5eaa236b45d3d417db44d5e5616b8

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