PDF malware analysis — malicious · fdc0ab7718095b6b

MALICIOUS

PDF

78.1 KB Created: 2021-02-12 10:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: debe414b033dd77befeaab9837623505 SHA-1: b212806b6d693c5ff79024001992bd20ce6c9e11 SHA-256: fdc0ab7718095b6b773eb8d63da4dad48e43b2563c4b661e3c7d3187c6830a6e

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous external links, many pointing to disposable hosting. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm for SEO manipulation or to distribute further malicious content. While no scripts were extracted, the presence of many external URLs and the overall structure strongly suggest a phishing or content distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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
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://druttle.ru/wix?keyword=falling+into+place+pdf+free+download PDF link annotation
- https://cdn.sqhk.co/pabefidinaz/dhcuzQy/active_site_protein_example.pdfIn PDF document text
- https://wovukevaz.weebly.com/uploads/1/3/4/5/134523328/637fe.pdfIn PDF document text
- http://zosujobitusup.iblogger.org/m_p_shield_40_cal_performance_center.pdfIn PDF document text
- https://vitudanowule.weebly.com/uploads/1/3/5/3/135341415/ab19e4a61.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450438/normal_600283ca54293.pdfIn PDF document text
- https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/jevegozukaximofozuv.pdfIn PDF document text
- http://vebumugaw.22web.org/25475204641.pdfIn PDF document text
- https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/2333358.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446774/normal_5ffc96ef87248.pdfIn PDF document text
- https://lowobuganigazo.weebly.com/uploads/1/3/1/1/131163610/dudodaf.pdfIn PDF document text
- https://refanise.weebly.com/uploads/1/3/5/3/135389799/8f6dce0b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4389816/normal_5ffe4a6f1a893.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446638/normal_5ffb3c66a4d32.pdfIn PDF document text
- https://cdn.sqhk.co/sovokeduseb/OFdgeij/moore_theater_plainwell_mi.pdfIn PDF document text
- http://kuxakutefop.22web.org/dunuxesitetirifolokutoz.pdfIn PDF document text
- https://cdn.sqhk.co/muribirigim/icegigi/bubble_pop_origin_level_83.pdfIn PDF document text
- https://zaderurumanig.weebly.com/uploads/1/3/4/5/134588260/furupa.pdfIn PDF document text
- https://cdn.sqhk.co/woleparos/fCjhHji/the_british_infection_band.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/jazamerijekufol/doraemon_adventure_game.pdfIn PDF document text
- http://pipinodojo.epizy.com/ecco_guidelines_iron_deficiency.pdfIn PDF document text
- https://s3.amazonaws.com/pizexopenaxu/formation_alternance_marketing_mode_paris.pdfIn PDF document text
- https://s3.amazonaws.com/tazopaju/palop.pdfIn PDF document text
- https://s3.amazonaws.com/rowubunak/my_boy_gba_emulator_apk.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_off0000f44e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF44E	5192 bytes
SHA-256: `763f9ec3e42b49f63cd8fad05179b47c4ad80a0cfd76bd8cbfb82a99acc78377`
`font_01_sfnt_off0001061f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1061F	10576 bytes
SHA-256: `5879771f490fc0f160a665eea7b03ceb3d9531ee2545da58b66b047454fbbd4f`

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