PDF malware analysis — malicious · 70aef1f0c8dabd21

MALICIOUS

PDF

84.0 KB Created: 2021-03-22 13:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 525496dbda21659035dd6af0e1951f83 SHA-1: dc92e2ec3ff282a1c8cec5cacd1166453e2a92fe SHA-256: 70aef1f0c8dabd21a81ff97e44b73c64b49edbccb2ff6d4943fd81f4de4d21e7

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains multiple embedded URLs, including one that appears to be a search result for game modification tools, suggesting a social engineering attempt. The malformed stream length heuristic indicates potential exploit activity within the PDF structure.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH

A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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://vilenefex.ru/wix?keyword=gta+5+mod+apk+unlimited+money PDF link annotation
- http://okclub.org/how_is_annual_leave_salary_calculatedzoisf.pdfIn PDF document text
- http://romeital.space/69039798154lknq.pdfIn PDF document text
- http://nejepogiz.iblogger.org/defekivifijas.pdfIn PDF document text
- https://zaxavafu.weebly.com/uploads/1/3/4/3/134323176/domiku.pdfIn PDF document text
- http://sale-siberian-force.online/the_secret_sharer_short_story_summaryif3au.pdfIn PDF document text
- http://tiktoktop.design/xazagiji0av1.pdfIn PDF document text
- https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/lavetamib.pdfIn PDF document text
- http://mignonette.space/996180168965rlga.pdfIn PDF document text
- https://xosinalujejiwa.weebly.com/uploads/1/3/1/4/131405948/7381124.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://pufaxutunipoja.epizy.com/42450244859.pdfIn PDF document text
- http://rijuteso.epizy.com/ignou_ba_public_administration_syllabus.pdfIn PDF document text
- https://s3.amazonaws.com/bidemewufa/59872196831.pdfIn PDF document text
- http://kesobikifa.epizy.com/becoming_a_teacher_11th_edition.pdfIn PDF document text
- http://gevotuwelu.rf.gd/how_to_get_fire_token_in_sorry.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4d5dfd13-1822-40df-8df7-29d83bea0b0c/universal_waite_tarot_deck_card_meanings.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bf4b0f58-a82b-4eb8-a653-ceddfb43a644/77046210977.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4118c0b8-9a68-4d9a-8aa8-2563c9317cca/93398758269.pdfIn PDF document text
- http://balunepikejevo.rf.gd/gufafubusus.pdfIn PDF document text
- https://s3.amazonaws.com/lezopobigeza/rick_wakeman_journey_to_the_center_of_the_earth_2012.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/534921f3-4b0f-4ab9-a4f0-f73acd994e84/what_is_validity_of_the_instrument_in_research.pdfIn PDF document text
- http://kabitivawenavox.rf.gd/39507569188.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_off0000fb87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB87	5032 bytes
SHA-256: `aa9176e6659758633624b8045d45cbc84baf8c2decfa9c9b1481d3d3bf285322`
`font_01_sfnt_off00010caa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CAA	12268 bytes
SHA-256: `10cb437ce2efa1b46808ac27b50ee335218aa9f5ec5b2d1d02cbc7ba0dbc4e30`
`font_02_sfnt_off0001343e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1343E	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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