PDF malware analysis — malicious · a9d93e2a8ac04290

MALICIOUS

PDF

80.6 KB Created: 2021-03-08 14:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 0d0657e365b4217ee72f1b338aa0688d SHA-1: 3dcc0737028a77f1d82b3a32929e3b13df25fd21 SHA-256: a9d93e2a8ac042902155a478eb18de5ca73e9dabdfd1be8a9e7b64d4339ffacd

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, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://crophysi.ru/strik?utm_term=the+cake+bible+cheesecake+recipe PDF link annotation
- https://cdn.sqhk.co/javeduner/JXakkhh/pezobuseserorodo.pdfIn PDF document text
- https://cdn.sqhk.co/tokofape/cbPAyij/laxipogiwetajo.pdfIn PDF document text
- https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/rogolibowik-dofaruvopip.pdfIn PDF document text
- https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/3152032.pdfIn PDF document text
- https://cdn.sqhk.co/jifigetuxu/Gichb7W/manatee_spirit_animal_definition.pdfIn PDF document text
- https://cdn.sqhk.co/waxobakal/gjYd1ig/54055378405.pdfIn PDF document text
- https://cdn.sqhk.co/zaliroded/ai4YrzP/all_us_shopping_deals.pdfIn PDF document text
- https://rupekiduwixe.weebly.com/uploads/1/3/4/7/134774185/pifuziz.pdfIn PDF document text
- https://cdn.sqhk.co/gowamojon/Tjfrfie/weed_strain_with_bright_orange_hairs.pdfIn PDF document text
- https://cdn.sqhk.co/perokokamosa/jIgczjg/sparkchess_7_download_free.pdfIn PDF document text
- http://bixofonan.iblogger.org/xevulamovexaxugupifuba.pdfIn PDF document text
- https://cdn.sqhk.co/gadukupuwe/Vmkhayt/gaxafuxarexudanupo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/xifabilejilab/ice_cream_merge_and_split.pdfIn PDF document text
- https://s3.amazonaws.com/telasebisu/jazujeli.pdfIn PDF document text
- https://s3.amazonaws.com/zufaxepixiguxax/talebategabiledubafud.pdfIn PDF document text
- http://bibarixe.epizy.com/assistir_globo_reporter_ultima_sexta_feira.pdfIn PDF document text
- https://s3.amazonaws.com/jukoxisojow/descriptions_the_color_of_sunrise_sheet_music.pdfIn PDF document text
- http://nexuvojof.epizy.com/harvard_style_referencing_generator.pdfIn PDF document text
- https://s3.amazonaws.com/jazuravazaguz/guidelines_traduo_para_o_portugus.pdfIn PDF document text
- https://s3.amazonaws.com/zarelusipofox/57043169760.pdfIn PDF document text
- https://s3.amazonaws.com/bezegoluzose/iceland_geological_map.pdfIn PDF document text
- https://s3.amazonaws.com/fodose/5958898108.pdfIn PDF document text
- https://s3.amazonaws.com/lekezaru/99912884559.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fbe5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBE5	5172 bytes
SHA-256: `6b5881e5eaace34b0d403c286e34db2f13a1584c4e0ac84ff19b8d9e0628be0f`
`font_01_sfnt_off00010d72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D72	11308 bytes
SHA-256: `917b82411f14abe76f80f68a1280b65c9ecf9cd136e7b6e8ee36ee297b429b39`

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