PDF malware analysis — malicious · 0ae20975b3f7ccc5

MALICIOUS

PDF

87.1 KB Created: 2021-04-03 04:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 4d78d08ffdebfb12f339751660985933 SHA-1: a2cd6662f90c125eeca63fec47301271c1232e75 SHA-256: 0ae20975b3f7ccc59e916326b2c0dc43eb0210eacda92a2ac0b6a7f5ff608c99

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URLs suggests the PDF is designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://jottigo.ru/wix?keyword=whack+my+phone+poki PDF link annotation
- https://cdn.sqhk.co/sebidurubuze/ViggZii/performing_arts_schools_in_manhattan.pdfIn PDF document text
- https://cdn.sqhk.co/lepavenujal/BYaRKid/18579950423.pdfIn PDF document text
- https://womutiliwefol.weebly.com/uploads/1/3/5/9/135964171/duwej_lemakito_nowod_nifutobej.pdfIn PDF document text
- https://mefimume.weebly.com/uploads/1/3/1/4/131437875/zerivibavowubo_fozanekuvanomiz_lasadepeletofoz.pdfIn PDF document text
- https://cdn.sqhk.co/lubigegek/dGhczhL/orange_tree_golf_club_scottsdale_reviews.pdfIn PDF document text
- https://zabonipe.weebly.com/uploads/1/3/4/4/134487368/5654148.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450519/normal_60542cdb76b9a.pdfIn PDF document text
- https://folutiniku.weebly.com/uploads/1/3/1/8/131871586/1959912.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370996/normal_604cc8e6907b3.pdfIn PDF document text
- https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/be531bcee971bba.pdfIn PDF document text
- https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/d5a2f095.pdfIn PDF document text
- https://datagoso.weebly.com/uploads/1/3/4/7/134718767/adf8de5c42a1fa.pdfIn PDF document text
- https://bosupazalo.weebly.com/uploads/1/3/4/4/134473359/fonosanafizileb.pdfIn PDF document text
- https://cdn.sqhk.co/sebidurubuze/Viihc0O/music_player_pro_apk_2018.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471273/normal_5fe920549f309.pdfIn PDF document text
- https://bidefajiwi.weebly.com/uploads/1/3/4/0/134096082/ledogupufef-gugutuvuvoro-vejoruraxirif-radopox.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465007/normal_60174fab8c0b7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465905/normal_6064e25b71090.pdfIn PDF document text
- https://temisufe.weebly.com/uploads/1/3/5/3/135384001/jojonuxedudomelilone.pdfIn PDF document text
- https://bopilewe.weebly.com/uploads/1/3/4/5/134523270/gatisofeni_mowikakirivuw.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_414def72c76d4d53a47612747d454e8e.pdf?index=trueIn PDF document text
- https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_2eacbbe554fb47e7811ac35f660af424.pdf?index=trueIn PDF document text
- https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_be0df44ca87c467cb25f46be97ab6b7a.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f083.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF083	7516 bytes
SHA-256: `2eeefe003d4762c664c2dc6a99f392b6b7f8856c8967d6dca56fd7f801fe96d9`
`font_01_sfnt_off00010956.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10956	5044 bytes
SHA-256: `64c5362cae9a502645c0bfed6130f946bddbbdc219bd0bb922e865b56b45dbb6`
`font_02_sfnt_off00011a6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A6B	2900 bytes
SHA-256: `c9fbd6abfcf1bbc428b908d2ca86cb93c707cb21bce74f855bd686ddf4345a75`
`font_03_sfnt_off000126cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126CB	12688 bytes
SHA-256: `3e829e67eb8d1a01d6ea4d27ff74b3f6cef0a1841703a0193066d802db86a01d`

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