PDF malware analysis — malicious · 72555fa84e894946

MALICIOUS

PDF

87.3 KB Created: 2021-03-09 05:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: 046c99c6c2028f4560380978d0cadf9e SHA-1: 84c4fe4a7ff5e161a475062158b55cc015115bae SHA-256: 72555fa84e89494680eea2afdce93937df38620da93ec4bd82a171175fe95964

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though truncated and obfuscated, suggests a lure related to 'dimensional analysis practice problems'.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 5

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 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=dimensional+analysis+practice+problems+with+answer+key PDF link annotation
- https://cdn-cms.f-static.net/uploads/4471479/normal_6022a61542d7b.pdfIn PDF document text
- https://cdn.sqhk.co/tigixexaxi/fiEhggh/wevebefamonaxifij.pdfIn PDF document text
- https://cdn.sqhk.co/vujenibolo/hahjkjj/bilediwegaxi.pdfIn PDF document text
- https://cdn.sqhk.co/rafumufo/agAgdhb/40767450917.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391636/normal_5fdc52360cb6d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501789/normal_5fcb3952402e6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4386094/normal_5ff85d251f72a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402706/normal_601a4ac354d83.pdfIn PDF document text
- https://cdn.sqhk.co/nazopekujavi/OKkYqie/5731216386.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410030/normal_5fe95d3a2b083.pdfIn PDF document text
- http://fegalaro.iblogger.org/europa_report_full_movie_480p.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379726/normal_5ff67d8692134.pdfIn PDF document text
- https://cdn.sqhk.co/liripudeb/ze0giRp/retrograde_motion_of_mars_simulation.pdfIn PDF document text
- http://tuwuradozanava.iblogger.org/58707375590.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475392/normal_603cf283e2dc9.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/4746cf6a-3b2e-4dcb-8cf7-f74ca9568c3b/69885438645.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97237a61-ba5d-44c4-b2b7-38c065b933d7/how_do_i_know_if_a_company_is_publicly_traded.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a559a1ae-5f06-48b1-9a61-69d333e0934a/yamaha_mg20xu_case.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a03bca97-cb7e-4fa4-9c45-e2b9dc090774/zapiju.pdfIn PDF document text
- http://jagazasa.epizy.com/hp_1320n_windows_10_driver_download.pdfIn PDF document text
- http://vetageluzox.rf.gd/49434973622.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4be36aab-6a4a-4f5e-94dc-97d0396e1da9/xopagabuzi.pdfIn PDF document text
- http://bimomog.rf.gd/love_feeling_video_cut_songs_tamil.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/22aaf6db-4210-4fed-b32a-de2c25772339/tekelenesu.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_off0000fc7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC7B	5360 bytes
SHA-256: `47494e08443221ebdba2e006e1134209f6ba75acbd514df9bc257d4a8b72ef93`
`font_01_sfnt_off00010e8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E8C	15720 bytes
SHA-256: `75d0e8fdc301c438ec85102a6af339156ff9afe98ce5f1828deadc4c5d6f01f4`
`font_02_sfnt_off00013eff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13EFF	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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