PDF malware analysis — malicious · bf51a31b53b6086e

MALICIOUS

PDF

70.3 KB Created: 2021-03-12 21:29:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 077f90445371ca5ff46355eb8750efcb SHA-1: 08870a1165fe023de99553a847678c2915e4112a SHA-256: bf51a31b53b6086e1d4ac7204f4905f4215e9387f6cd3c639b5845435042e129

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The primary URL observed is 'https://bologen.ru/wix?keyword=bissell+86t3+parts', which likely serves as a lure. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, potentially leading to phishing or further malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=bissell+86t3+parts PDF link annotation
- https://cdn.sqhk.co/zugeketinog/xgijTjc/baixar_jogos_android_de_futebol.pdfIn PDF document text
- https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/309b54d.pdfIn PDF document text
- https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/medulumu.pdfIn PDF document text
- https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/lusomiga_disago.pdfIn PDF document text
- https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/8763012.pdfIn PDF document text
- https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/2c07ddb85a3e.pdfIn PDF document text
- https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/nasezufelijekomegam.pdfIn PDF document text
- https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/7256968.pdfIn PDF document text
- http://ttttrrrr.space/4644541862aqu0o.pdfIn PDF document text
- https://ragixadimeruwu.weebly.com/uploads/1/3/4/8/134897014/3644b9.pdfIn PDF document text
- https://tarezusubem.weebly.com/uploads/1/3/5/3/135386237/zijoj.pdfIn PDF document text
- https://cdn.sqhk.co/vubenexew/gjebhfu/raferub.pdfIn PDF document text
- http://copyrightsupportforlnstagram.com/fivage253gy.pdfIn PDF document text
- http://icub.tech/xedopxqqyo.pdfIn PDF document text
- https://derigogo.weebly.com/uploads/1/3/4/0/134017063/9658808.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/lebejos/game_online_android_terbaru_2018.pdfIn PDF document text
- https://s3.amazonaws.com/fadobirak/20447914445.pdfIn PDF document text
- https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_694f88a961f14c47a37920f3a8a75aa9.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xokebore/zutujuwavazijileran.pdfIn PDF document text
- https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_b63e24662ac44a74a947d673ca178dbe.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kubedukowug/67036472506.pdfIn PDF document text
- https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_7209b136e3b447aba57cd82ca4438bac.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d4d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4D4	5376 bytes
SHA-256: `d65ddd1537e99833a3150a1855e4d71cd07535a8cf713813624a99b4c1122961`
`font_01_sfnt_off0000e722.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE722	10464 bytes
SHA-256: `6777136006ef1a42f9267df92db7d5ddb0f09bc2f4aafe956896413cdc526bf9`

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