PDF malware analysis — malicious · a80f6f0f9655fbde

MALICIOUS

PDF

79.7 KB Created: 2021-05-23 02:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 2671a939a6a3316465cbf5839522b659 SHA-1: 50a6c03b07b6806ab2f00bdd10067aafe5965bec SHA-256: a80f6f0f9655fbde0f83d0c065cde8c3be6fe5386b26858929e5f8aa8ba4066f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/strik?utm_term=enerpac+zu4+pump+manual PDF link annotation
- https://wuzijitegufizu.weebly.com/uploads/1/3/5/3/135320378/4d055134f.pdfIn PDF document text
- https://rokubupudila.weebly.com/uploads/1/3/1/8/131856034/286338e55.pdfIn PDF document text
- https://puranezujifa.weebly.com/uploads/1/3/4/5/134582728/1b764.pdfIn PDF document text
- https://rakatifuz.weebly.com/uploads/1/3/5/9/135964199/dobigozeweboze-lipibogenitojok.pdfIn PDF document text
- https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/metizoge.pdfIn PDF document text
- https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/bacff2afe.pdfIn PDF document text
- https://napumijuvof.weebly.com/uploads/1/3/4/7/134758185/nabipuwenufari.pdfIn PDF document text
- https://bakigimos.weebly.com/uploads/1/3/4/3/134322269/6033906.pdfIn PDF document text
- https://vokugovu.weebly.com/uploads/1/3/4/5/134598923/135b56e1eac24.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/a72dc1ae-caf3-4854-a6a5-e9f45f839dcd/lefinokaletetowelibeb.pdfIn PDF document text
- https://s3.amazonaws.com/pobixedele/49390539588.pdfIn PDF document text
- https://s3.amazonaws.com/mejados/hsslive_physics_half_yearly_answer_key_2018.pdfIn PDF document text
- https://s3.amazonaws.com/rabewiruzitewa/tivavuw.pdfIn PDF document text
- https://s3.amazonaws.com/tokudapele/28757366381.pdfIn PDF document text
- https://s3.amazonaws.com/mijumomub/metidupirajijabonizab.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fc37788e-cfac-49b1-b2bf-9fd4df2793c2/does_stamets_7_work.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/86ac9d31-cb80-463c-9a1c-a821905d26f2/lisibunevumusujimizabod.pdfIn PDF document text
- https://s3.amazonaws.com/wujixus/96337755159.pdfIn PDF document text
- https://s3.amazonaws.com/sewamos/12865077333.pdfIn PDF document text
- https://s3.amazonaws.com/lorerexeg/narafe.pdfIn PDF document text
- https://s3.amazonaws.com/xidazeze/93400317324.pdfIn PDF document text
- https://s3.amazonaws.com/rilexazejuzovep/gozamaxetogezurugob.pdfIn PDF document text
- https://s3.amazonaws.com/xanunafojuloki/8027622786.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_off0000eefc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEFC	3568 bytes
SHA-256: `5dd682fc4d83f487aad2909981a3b0774dab753df6828a0f50f28a9a0d43b511`
`font_01_sfnt_off0000fbba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBBA	4996 bytes
SHA-256: `08820c0b0d42972c45af89222075b1a1cd16e8a27fdc7c98dadc5b010bbd6074`
`font_02_sfnt_off00010cb3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CB3	10724 bytes
SHA-256: `a309800c2d34d3b6c7b25846344d9c87e5a9687daff8146a6caaeb36aa066396`

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