Malicious PDF — malware analysis report

Static analysis result for SHA-256 7585a1ee207ceaf6…

MALICIOUS

PDF

70.2 KB Created: 2021-04-09 10:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ab70d5f2c5f30321b9b05532fafefb12 SHA-1: 51f9d5b958a34d7cf3f7b9bcdadf824eed9265ab SHA-256: 7585a1ee207ceaf6d5a4ac0b5316726bcc736f2d155d8376d3d0e5db75757b01
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=bodyweight+exercises+for+arms+reddit PDF link annotation
    • https://dunelakanova.weebly.com/uploads/1/3/1/4/131410870/488202514.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/PKgiKjg/buy_roof_tiles_near_me.pdfIn PDF document text
    • http://copyright-supporthelp.com/hamilton_beach_countertop_rotisserie_convection_toaster_oven_large_stainless_steel_31107dv3cgi.pdfIn PDF document text
    • http://carbackseat.site/winafalenazabojotekovoupni1.pdfIn PDF document text
    • http://wonnaturila.space/75136873066sxpk6.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/f45kv6R/zitelogadipefemefif.pdfIn PDF document text
    • http://goloszauniver.fun/vifuzukufulute93ii.pdfIn PDF document text
    • https://bupudotededifo.weebly.com/uploads/1/3/5/3/135323991/7901922.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/AejfWuK/28629284446.pdfIn PDF document text
    • http://mandarins.space/zovefaat1gz.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/giNr9cH/sepsis_guidelines_sofa_score.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rezujadutifinom.rf.gd/zujise.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/bolens_riding_lawn_mower_wont_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba04720-5d0a-4bd7-b94f-a98e1acbe1d8/78716248002.pdfIn PDF document text
    • http://wunipowozat.rf.gd/12344435043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b19968-fd4a-4731-a67f-482864969219/kixamutorixivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f509e621-145e-4d2f-8e0b-d10ea3db3541/delonghi_safe_heat_trh0715l_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/a1278_keyboard_replacement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/65527039444.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/gaya_hidup_hedonisme.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_off0000d391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD391 5716 bytes
SHA-256: 68cfae7e975039468ae05a76f45485ba25a65fe9367af6a6a45161f90d7b2cdf
font_01_sfnt_off0000e707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 10640 bytes
SHA-256: ccd62a058d0d3a22cfcf12ad172fb078e04c92930b39e63f2180cde55cad47be

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