PDF malware analysis — malicious · c4acd9d774b01192

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 20:16:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 873803ecd78a6c3af0170c7d25622532 SHA-1: 9edd8999a1c31481b996da8a2f839cc0e173b21a SHA-256: c4acd9d774b01192dcf9752e27fdfd44ce5a08429f23e5e3f33320dc026dfa28

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious intent, including suspicious and invisible links to external domains. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery mechanism. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE

PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
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://golowaki.ru/123?utm_term=affinity+photo+beta+windows PDF link annotation
- http://iranomics.com/nature_sound_message_tone_download8k8x6.pdfIn PDF document text
- http://appeal-ig.com/xizawurefeworag52fmc.pdfIn PDF document text
- http://wow50.pro/tixixaxuvusulab7whj.pdfIn PDF document text
- http://monongzhlh.space/fingerstyle_guitar_songsp13ek.pdfIn PDF document text
- http://komujevakikumu.22web.org/mediaget_free_for_windows_10.pdfIn PDF document text
- http://com-login8.xyz/71354899262azp6i.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
- https://uploads.strikinglycdn.com/files/9e5a78b6-d744-4c72-b191-9afcb81ee44c/zeboletepegesivak.pdfIn PDF document text
- https://s3.amazonaws.com/zetubakuz/what_is_the_best_oled_55_inch_tv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0b38c53a-2eae-480e-9755-85a9958ca1b5/the_game_of_life.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f81f37d5-8ab3-4e96-bf10-babee5289846/venadumanad.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/82196e16-64f3-48a4-9449-4bf9c68d5f47/2166_cub_cadet_mower_deck_parts.pdfIn PDF document text
- https://s3.amazonaws.com/mexesazaxasa/vusuvon.pdfIn PDF document text
- https://s3.amazonaws.com/gewuwasi/learn_korean_alphabet_comic.pdfIn PDF document text
- http://fizaveloxuraje.rf.gd/99250546124.pdfIn PDF document text
- https://s3.amazonaws.com/tesodagiwor/mass_conversion_worksheets_year_5.pdfIn PDF document text
- https://s3.amazonaws.com/pulavokaxe/82063049824.pdfIn PDF document text
- http://ritopagagibuxu.epizy.com/avl_tree_in_data_structure.pdfIn PDF document text
- http://nufeluzuxaluw.epizy.com/how_to_change_battery_in_2011_ford_focus_key_fob.pdfIn PDF document text
- http://bimagox.rf.gd/wediwaxa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ae4f1f12-45e9-4f94-af4d-56b8b5e4bc7d/chronicles_of_narnia_books_age_rating.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_off0000ee1b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE1B	5112 bytes
SHA-256: `94bc0a6101a51cd8f2234800e0fbebe503b9fd1b9a7a80f46cf79745d46806b4`
`font_01_sfnt_off0000ff84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF84	11340 bytes
SHA-256: `8d146f28509eab768e1d212c5fcb8f627b8a91b954562b7690e7fa515c297d5e`
`font_02_sfnt_off0001265b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1265B	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

Open this report in the interactive analyzer, or submit your own file for analysis.