PDF malware analysis — malicious · 0d61db9d1a2336b5

MALICIOUS

PDF

79.7 KB Created: 2021-03-14 21:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 61ac9ebc1730dea9dd9d2b646719e3f7 SHA-1: 6e6d0c11449a13f7347f7ab83720ec0ba9d66405 SHA-256: 0d61db9d1a2336b58db837e93385f257272639ba2e2ddacae1fdaede0a11986a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a deceptive lure related to a book summary, designed to trick users into visiting these external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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 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.
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://zajinet.ru/strik?utm_term=gadamer+truth+and+method+summary PDF link annotation
- https://cdn.sqhk.co/nuvaratuji/fPgiaeT/wisamomori.pdfIn PDF document text
- https://vubufogos.weebly.com/uploads/1/3/4/7/134766152/puluj_jesopoxiwimet_ximufaxifo_jobimabaji.pdfIn PDF document text
- http://zomotumat.iblogger.org/91017607432.pdfIn PDF document text
- https://cdn.sqhk.co/tavaxiwugo/ywTiggX/cut_the_rope_2_level_11.pdfIn PDF document text
- https://foderojev.weebly.com/uploads/1/3/4/0/134041652/rajewonadapamal_kekinanazatas_duvumalip.pdfIn PDF document text
- https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/01a5a.pdfIn PDF document text
- https://cdn.sqhk.co/fowurona/giws6gh/call_of_duty_zombies_maps_black_ops_2.pdfIn PDF document text
- http://fexanamudavixi.iblogger.org/71074110263.pdfIn PDF document text
- https://katinena.weebly.com/uploads/1/3/1/3/131383377/vigevawexi.pdfIn PDF document text
- https://cdn.sqhk.co/piwizogir/7uD8Ghc/shumaila_kosar_naat_video.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/xupizewuxere/lp_fistula_perianal.pdfIn PDF document text
- https://s3.amazonaws.com/liguwubore/phosphoryl_transfer_potential_definition.pdfIn PDF document text
- https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_fccce363008e46d6b5351b5c650ba08a.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xiwevitox/77427420745.pdfIn PDF document text
- https://s3.amazonaws.com/tabobujimo/40228531715.pdfIn PDF document text
- https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_3cc1efcacb0741328f6c52b1019eb9ef.pdf?index=trueIn PDF document text
- http://gizugutopaf.epizy.com/guxupunusijaxipuzibofema.pdfIn PDF document text
- http://sumorililuduj.epizy.com/business_information_tech_course.pdfIn PDF document text
- https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_7356d9ec602c434dbdbe79029c5147a0.pdf?index=trueIn PDF document text
- https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_b1226c6806b542e49602a4f3238298c5.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bokofapig/36719434272.pdfIn PDF document text
- https://s3.amazonaws.com/xakajoziwibi/57742534700.pdfIn PDF document text
- http://rapudipawuv.epizy.com/mathusee_geometry_answers.pdfIn PDF document text
- https://s3.amazonaws.com/fekazudabo/gym_membership_contract_template_free.pdfIn PDF document text
- https://s3.amazonaws.com/kavifunaruvi/what_is_extensible_business_reporting_language_xbrl.pdfIn PDF document text
- https://s3.amazonaws.com/wenobagupexekap/hays_recruitment_melbourne_timesheet.pdfIn PDF document text
- https://s3.amazonaws.com/xovajukoxin/nozoroteseligibo.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_off0000f8ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8AE	5164 bytes
SHA-256: `b1bbf8ae807ddb87ade3b712a456cdd4ed2acb8695305b66293fef06bb90c900`
`font_01_sfnt_off00010a1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A1A	11636 bytes
SHA-256: `f8610ee83cc582ce38f9c6ebf34dbddc0833e12a0c040081c62a779440101473`

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