Malicious PDF — malware analysis report

Static analysis result for SHA-256 128bfb05c1e3fc7f…

MALICIOUS

PDF

74.0 KB Created: 2021-02-14 12:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: eab043c9c0be094bb47ad6199eb2c368 SHA-1: 1a42ab678f175344e0320a00757e66c6b75e6d85 SHA-256: 128bfb05c1e3fc7f0c944944129e4f95429360ee03935637dcbbdcd19681f5a4
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded content, though heavily obfuscated, likely serves to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/123?utm_term=iso+17020+pdf+indonesia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5fe41dfb3479f.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/pijorixamojaxo-ledigetujopix-paxogumew.pdfIn PDF document text
    • https://solekavugixe.weebly.com/uploads/1/3/3/9/133999951/gunibexunuku.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/8ZGghjj/ladybug_wallpaper_for_iphone.pdfIn PDF document text
    • https://wedemewimobuxet.weebly.com/uploads/1/3/4/3/134309086/4194783.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/balifuderekajek_pewogufuxezit_jonuj.pdfIn PDF document text
    • https://zazibarem.weebly.com/uploads/1/3/0/7/130775746/lepukewozape_zopexijig_danaru_togezotoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_60127cf9368c4.pdfIn PDF document text
    • https://nojilanoxejajej.weebly.com/uploads/1/3/4/8/134856497/2661567.pdfIn PDF document text
    • https://zorusijumabek.weebly.com/uploads/1/3/4/8/134851431/tijodenumojas.pdfIn PDF document text
    • https://dawurawo.weebly.com/uploads/1/3/5/3/135323901/2842461.pdfIn PDF document text
    • https://mapaforidax.weebly.com/uploads/1/3/4/0/134012560/kipokid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipiwimepi.epizy.com/gapekiw.pdfIn PDF document text
    • http://badokelo.rf.gd/35481496045.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/difference_between_butte_and_mesa_landform.pdfIn PDF document text
    • http://muxolisakij.epizy.com/27910147594.pdfIn PDF document text
    • http://totofexux.epizy.com/77898984802.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/balam_ji_love_you_film.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CE 5248 bytes
SHA-256: 86b67dbd4a72f2c9c5912f34eecbd1576fac3c805cee1060ae890324d13c42bd
font_01_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 12820 bytes
SHA-256: 0fb9da0a650dc6cf9ef8d6f5681e63758a039d09583c536b25bb0f096990960e

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