PDF malware analysis — malicious · abdb1d4146828da3

MALICIOUS

PDF

123.8 KB Created: 2021-03-04 23:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: a49d21ef1c96a37946bd22a61a4d3531 SHA-1: 144f47db5d985fa3384e0acf465ac937b7ca9908 SHA-256: abdb1d4146828da347ec0be1b41f62e81eb445f27782a868acaf5c4387e24673

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, indicating a phishing or malware distribution attempt. The document body, though partially obfuscated, suggests a lure related to 'term dates', likely to trick users into clicking the malicious links. The presence of numerous links on disposable hosting further supports the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://crophysi.ru/wix?keyword=cccc+2020+term+dates In PDF document text
- http://puveputado.sportsontheweb.net/59371404576.pdfIn PDF document text
- https://cdn.sqhk.co/janezewufaj/jb2gjgi/51526631209.pdfIn PDF document text
- http://duxaromovaxizom.iblogger.org/how_to_calibrate_hayward_goldline_salt_system.pdfIn PDF document text
- http://zugugalepew.mypressonline.com/82548601149.pdfIn PDF document text
- http://fidofawi.medianewsonline.com/rereading_america_11th_edition_mla_citation.pdfIn PDF document text
- https://cdn.sqhk.co/rasepotobami/hbhsigN/69183270341.pdfIn PDF document text
- https://cdn.sqhk.co/bebuvasipen/eyziija/zombie_tsunami_hack_ios_2019.pdfIn PDF document text
- https://cdn.sqhk.co/toxinize/jdXoieF/walking_by_faith_southern_gospel_group.pdfIn PDF document text
- http://vikutoxe.iblogger.org/how_to_simplify_rational_expressions_with_fractions.pdfIn PDF document text
- http://sdfsdfsdf.shaketorch.com/ruxisedezimaxovujalen.pdfIn PDF document text
- http://dimozakebaba.scienceontheweb.net/namor.pdfIn PDF document text
- https://cdn.sqhk.co/jiloduvunilu/chcX0gd/65939803082.pdfIn PDF document text
- https://cdn.sqhk.co/xelajuwodaf/rhigihb/88485695133.pdfIn PDF document text
- https://cdn.sqhk.co/jojevirelo/eticSld/jetpack_jumper_tips_and_tricks.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://kubuxakul.epizy.com/cfa_level_1_curriculum.pdfIn PDF document text
- http://xodubepegiluli.rf.gd/woxomux.pdfIn PDF document text
- https://s3.amazonaws.com/nalifij/animated_keynote_presentation_templates.pdfIn PDF document text
- https://s3.amazonaws.com/ragejufa/15556044918.pdfIn PDF document text
- http://juxudawalugevop.epizy.com/merenuwasozijegotej.pdfIn PDF document text
- https://s3.amazonaws.com/dixaleko/how_to_apply_for_medicaid_in_michigan_for_pregnancy.pdfIn PDF document text
- https://s3.amazonaws.com/satulibaren/46317933168.pdfIn PDF document text
- https://s3.amazonaws.com/wetevali/19446951312.pdfIn PDF document text
- http://vurorevebosexu.rf.gd/british_council_ielts_books_free.pdfIn PDF document text
- http://fojeropiralamab.rf.gd/wojiwixuwafaru.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001679d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1679D	16868 bytes
SHA-256: `6dd66db0c9aa88792545d485d29a10ad8267feb6c8ef9e47d0ad26e3aa43168d`
`font_01_sfnt_off00019d17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19D17	5232 bytes
SHA-256: `d258670f0ec924d0fdf1c2b9db579b5fab7d7698b8c9697335181a6648a241ac`
`font_02_sfnt_off0001aec2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AEC2	16144 bytes
SHA-256: `1143cbb5e6b79672e218b9b7d098dc243958ef80136b9262096a4739fdabacd8`

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