Malicious PDF — malware analysis report

Static analysis result for SHA-256 754c3ed890d07d9c…

MALICIOUS

PDF

70.7 KB Created: 2021-03-24 19:35:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 32919c7a48ccfd7d63a17a533f3d64e4 SHA-1: ded13b83767c2aede095e0c1c3e83b12f17399a7 SHA-256: 754c3ed890d07d9cc5769653aa5592cd7a61b2b55c533fa4eaa963d49295976d
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://fokemale.ru/strik?utm_term=can+you+still+buy+kenmore+washers PDF link annotation
    • http://1s.london/keto_ketones_guidek14nv.pdfIn PDF document text
    • https://jafoxoxuxovawe.weebly.com/uploads/1/3/0/8/130813536/fobokobafefujirufa.pdfIn PDF document text
    • http://fastpeysistem.online/what_does_the_color_red_and_yellow_meanv56u0.pdfIn PDF document text
    • http://instapriz24.site/77368950689lwn37.pdfIn PDF document text
    • http://metazoaapc.fun/208157105442d07j.pdfIn PDF document text
    • http://www19216801.site/162045415078mns9.pdfIn PDF document text
    • http://prizinsta.info/wekajubovufoicq1.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/somisig.pdfIn PDF document text
    • http://passive-income.ru/sewikagug7l7dy.pdfIn PDF document text
    • https://darizifipofoluw.weebly.com/uploads/1/3/2/8/132815181/jumizadif_puwuwomibe.pdfIn PDF document text
    • http://unonatur.space/584298681950o6f5.pdfIn PDF document text
    • https://terunutu.weebly.com/uploads/1/3/5/3/135319236/kufatitataj_tenuwaseturu.pdfIn PDF document text
    • http://fitnesspack.net/shadowhunters_the_mortal_instruments_full_movie_20195yrn3.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/b238b096-f4b8-48ff-b518-c8cd58817f8d/confidence_treadmill_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93cdbed6-15f2-4602-93f3-371cb23504c8/jajadepit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be39363-6645-484c-81f0-a8ac7faed843/how_to_set_heater_in_gree_inverter_ac.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/pamaxabagonotuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/535c7ef0-9573-438a-9d1d-f228de45ea8d/logitech_k400_k400_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/32118800311.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_off0000d73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73C 5228 bytes
SHA-256: 3c20dfd1f67f96ba9cdbb831a6eb13d852cf8bdbb00d32b6c0205ca34f7f37e5
font_01_sfnt_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 10724 bytes
SHA-256: 3e2cd311aeb54c7f56483befa2c5983127cb9c184c26a244150cce9307346db9

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