PDF malware analysis — malicious · 8170d1c932884b48

MALICIOUS

PDF

92.2 KB Created: 2021-05-23 13:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 34dcbe00897c1e252f44728f1577bdee SHA-1: 05c27623bab7342c30a4b529ab8efcc9aee2c702 SHA-256: 8170d1c932884b485ed2d573300fdd2c57dc76a8b928ce842772fe5c9e8d49e5

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 0.9980

Heuristics 5

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.
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://dafemum.ru/strik?utm_term=actividad+integradora+modulo+4+semana+3 PDF link annotation
- https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/nipir.pdfIn PDF document text
- https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/7193111.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448126/normal_600fe4024c3e6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448346/normal_600e11934c516.pdfIn PDF document text
- https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/071a82.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418796/normal_6069363d753a3.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/suxiweke/21657911341.pdfIn PDF document text
- https://s3.amazonaws.com/baritexovopa/battery_calibration_apk_mod.pdfIn PDF document text
- https://s3.amazonaws.com/lekezaru/96180589133.pdfIn PDF document text
- https://s3.amazonaws.com/sugosubexez/dozefefikekoxujakogas.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0e6e8628-3f20-4f0a-a0e9-2e8e1b1f8013/what_is_the_weight_of_a_plastic_cup_use_over.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/84e1cc43-68c8-4b36-8873-567ecdfe52b1/88082644222.pdfIn PDF document text
- https://s3.amazonaws.com/tigovatolis/ebay_30_day_return_policy_2020.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0c1d7a9e-3103-49f5-b16e-cb534dbe47aa/kumuwijugoguxomix.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9e040e01-7512-48bb-8327-d7a7df0f9c0e/tanatapajuzikepozesefikid.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3e1f205b-524f-4ed5-a800-07287a47f19d/fundamentals_of_social_research_methods_an_african_perspective_5th_edition.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/00139768-7695-47c6-8ad7-3fc3c06b8b17/dugilode.pdfIn PDF document text
- https://s3.amazonaws.com/xamibebulosaxug/porsche_cdr30_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/972d5c4d-2a46-4952-aa7a-e8011074734f/which_hits_the_ground_first_a_golf_ball_or_a_bowling_ball.pdfIn PDF document text
- https://s3.amazonaws.com/geradi/58799114640.pdfIn PDF document text
- https://s3.amazonaws.com/jixeremipet/41948473349.pdfIn PDF document text
- https://s3.amazonaws.com/paxunu/sukosademul.pdfIn PDF document text
- https://s3.amazonaws.com/babetafaperaxov/marriage_certificate_format_up.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/81519d37-0d67-414f-99dd-9d23190e2189/ps_vita_3000_price_in_india.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001076d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1076D	5560 bytes
SHA-256: `395015c01ee60ad7e6db4babe6583fa56d65f9cb0661eb58706866fc55ea58b1`
`font_01_sfnt_off00011a4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A4E	2024 bytes
SHA-256: `4ec9563bd2a1fa1c34a5f8d37795094ade5d8c4dce2fb403013c7fb5dadb1dc2`
`font_02_sfnt_off000123f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123F8	11900 bytes
SHA-256: `9bb96d04cf2936bfebf96ce4c2d5c35afab3140fb1485ae1848315b3cb7911d4`
`font_03_sfnt_off00014b46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14B46	16204 bytes
SHA-256: `532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e`

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