Malicious PDF — malware analysis report

Static analysis result for SHA-256 e895317dc6cc573d…

MALICIOUS

PDF

100.4 KB Created: 2021-05-27 20:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a3792af514f97d53b0626f25e7938764 SHA-1: deb8ed11def4fa241695ae5efc68b5a28848c413 SHA-256: e895317dc6cc573d30f05f778b0234485d46c7083309df373f9ef00c4f73b761
186 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 by multiple heuristics as a link farm and detected as malicious by ClamAV and an ML classifier. The document contains numerous external links, including one to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The presence of embedded links and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://nipisod.ru/strik?utm_term=hacksaw+ridge+full+movie+dual+audio+download+720p+bluray PDF link annotation
    • https://gebajujevaxudod.weebly.com/uploads/1/3/5/3/135398545/e41311c5.pdfIn PDF document text
    • https://fepuguraxetud.weebly.com/uploads/1/3/7/5/137512182/86edf2ea.pdfIn PDF document text
    • https://likixulojuxe.weebly.com/uploads/1/3/4/3/134386003/solarowiziwo-xumegesulawaxut.pdfIn PDF document text
    • https://bawusazatodopam.weebly.com/uploads/1/3/1/3/131378774/7824880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405185/normal_5fe5ea9cb784c.pdfIn PDF document text
    • https://fudanologakobur.weebly.com/uploads/1/3/5/3/135394175/nitug.pdfIn PDF document text
    • https://kivomulugan.weebly.com/uploads/1/3/2/6/132695939/7d0faa6472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_6049cd808412f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482863/normal_5ffa863e80067.pdfIn PDF document text
    • https://futuziduxe.weebly.com/uploads/1/3/4/5/134508203/lofebisufafufug.pdfIn PDF document text
    • https://lozofatogil.weebly.com/uploads/1/3/0/7/130739213/renimi.pdfIn PDF document text
    • https://meverelalopabij.weebly.com/uploads/1/3/4/1/134108836/xepoxej-zidax-witisiwejifise.pdfIn PDF document text
    • https://wegeduvoxu.weebly.com/uploads/1/3/4/6/134634177/8575024.pdfIn PDF document text
    • https://diwixovejawi.weebly.com/uploads/1/3/4/3/134316523/fudoxipega_zexalunila.pdfIn PDF document text
    • https://xugofuli.weebly.com/uploads/1/3/1/0/131070332/vutubobif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b46b935-edc1-4a52-ab64-67cfcd368591/53368628050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3bf7ac0-0eda-4ab3-921d-bb3160be9c07/10831138032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e72cb51-6822-4a9f-8a6b-27e1c77d16e9/70643742480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86dee4dc-4896-47d4-a4cd-e9001578a4e3/timijopozarujup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677216fb-453d-4ff7-9f6e-01ee8980129b/76898110556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de23068d-52a1-400f-8eb4-2cdafe289aee/rumodegifometonadobaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63510a3e-b058-4726-93fb-628c7099b2ff/mosazubadigodolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0355924b-b946-4e18-a056-fed63c070357/68187961605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ccd9b0-c560-46fb-bd58-d960132cb465/zubufapime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b975a47f-31b6-4f2c-93c5-bad68dacd4c0/10699220091.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn 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
stream_005_off00015b46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15B46 22632 bytes
SHA-256: 4cb1e4c0e09ea4728af600385f394fdf785192133b347f168b9422595a66c295
font_00_sfnt_off0001135e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135E 6248 bytes
SHA-256: 24a83a187f926e7f5f4b4a1b8ecb6fa27e24c6c387e4c3ef7d3e2e97f2e7d48f
font_01_sfnt_off000128b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B2 19352 bytes
SHA-256: e6452f7dd2cd809dee27b4836140c3cb3ae7b86df44af0263ce9db336776eef0

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