PDF malware analysis — malicious · 897eac1c84d2a272

MALICIOUS

PDF

77.5 KB Created: 2021-06-10 04:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: e430357fca6af6a08c6acba3a1218763 SHA-1: f14ad1a1316e13093fa0b466018e74f6686e5fdf SHA-256: 897eac1c84d2a272de7329ed54d4764ec99cc0453e8eeb81732d075702bf0cd6

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm designed to distribute traffic. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM firings, along with the ClamAV detection and ML classifier, strongly suggest malicious intent. The embedded URL and the document body's mention of 'free svip account gloud games' point towards a phishing or scam lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://coretry.ru/pbw?utm_term=free+svip+account+gloud+games PDF link annotation
- https://wiperorapaxomun.weebly.com/uploads/1/3/5/3/135323561/muwuga.pdfIn PDF document text
- https://rawudirujitasep.weebly.com/uploads/1/3/4/5/134588445/222363.pdfIn PDF document text
- https://zowupenejanelaw.weebly.com/uploads/1/3/4/3/134397621/vefav.pdfIn PDF document text
- https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/teladef_puzuguv_wisiwo.pdfIn PDF document text
- https://tidivexosito.weebly.com/uploads/1/3/4/3/134316292/wijuvor.pdfIn PDF document text
- https://buxexuwuf.weebly.com/uploads/1/3/4/6/134660927/7014114.pdfIn PDF document text
- https://newowuwaw.weebly.com/uploads/1/3/4/6/134634034/c79391a4ff61.pdfIn PDF document text
- https://revejoduxu.weebly.com/uploads/1/3/4/2/134266419/tufarujob.pdfIn PDF document text
- https://numuwawi.weebly.com/uploads/1/3/2/3/132303164/zigid.pdfIn PDF document text
- https://juwalonivegab.weebly.com/uploads/1/3/5/3/135309433/risosafirakuvisul.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/dee34a51-a136-4e81-a44e-9a2cbc43e7e3/are_in_a_sentence_for_kindergarten.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2938e9e9-83a1-4360-b436-a1727e3344b6/whirlpool_quiet_partner_iii_filter.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4d1c41df-ea56-4f87-9bbf-cc165aa16a1f/good_captivating_books.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/16bdee59-477c-4885-bca8-b367893084fc/78332162433.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9dcccfa6-b76b-4cd2-841d-40cb6a38e7ae/summer_waves_pool_filter_pump_leaking.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/53e384fa-bbef-4991-a7ca-e8236ace4a9e/67158935637.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3b4f083b-8fa6-41be-b135-7549e3ad19ec/17830873090.pdfIn PDF document text
- http://vamafob.pbworks.com/w/file/fetch/144473805/can_star_wars_battlefront_2_be_played_offline.pdfIn PDF document text
- http://paditoxef.pbworks.com/f/95234290221.pdfIn PDF document text
- http://gijutexamuwa.pbworks.com/w/file/fetch/144873276/online_kitap_oku_cretsiz_indirmeden.pdfIn PDF document text
- http://ziduzobif.pbworks.com/f/kinev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e736cbfa-864a-457c-a333-5dfb4056c906/how_to_shut_off_a_kidde_smoke_alarm.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cb5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB5D	5288 bytes
SHA-256: `3aeb70e8598861954129f318c85817e28c152fa2afe82c90b1a8fc15a350a31c`
`font_01_sfnt_off0000dd39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD39	2092 bytes
SHA-256: `6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5`
`font_02_sfnt_off0000e6df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6DF	10668 bytes
SHA-256: `31e3b9b4ed586efbf352559cd5ebda7fbec2d64e9c2dade54b359ce91bd64162`
`font_03_sfnt_off00010b64.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B64	16344 bytes
SHA-256: `ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190`
`font_04_sfnt_off000120dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120DC	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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