PDF malware analysis — malicious · 307140b4b293b80c

MALICIOUS

PDF

83.1 KB Created: 2021-01-19 18:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 7b20926d19bcf77454f91a0e6a243a5f SHA-1: 5d941cc5d4861fdc8a1a0e5329bec8314493bcbb SHA-256: 307140b4b293b80cc98081f9ad28e9c3e9745867354ef51e8c8d8acbc9755cd2

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (traffine.ru). The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search results and app downloads, aligning with a phishing or scam lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://traffine.ru/aws?utm_term=10th+12th+board+result+2019+app In PDF document text
- https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/7577963.pdfIn PDF document text
- https://cdn.sqhk.co/zubavagi/jh94cjf/kijedofi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485587/normal_5fb9ec63653c7.pdfIn PDF document text
- https://cdn.sqhk.co/gadukupuwe/5ij2Kie/46924198764.pdfIn PDF document text
- https://cdn.sqhk.co/ronofumito/n50cjdG/papers_please_ps4_store.pdfIn PDF document text
- https://lodiwuziwinum.weebly.com/uploads/1/3/4/5/134502140/vovetu.pdfIn PDF document text
- https://datugabow.weebly.com/uploads/1/3/4/7/134745554/7a81ada8665e6.pdfIn PDF document text
- https://cdn.sqhk.co/wabajevebe/hhtyjhs/lepomemapov.pdfIn PDF document text
- https://site-1177603.mozfiles.com/files/1177603/animatronic_mod_minecraft_1__12__2.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387419/normal_5ff59e87107df.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389821/normal_5f9484d524b9c.pdfIn PDF document text
- https://site-1168148.mozfiles.com/files/1168148/pubaxejafaxun.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371269/normal_5fd12dd75235a.pdfIn PDF document text
- https://site-1186310.mozfiles.com/files/1186310/android_10_for_note_9_release_date.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486971/normal_5ff2a74a3a326.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
- http://bezopiwuzalobit.rf.gd/pagexel.pdfIn PDF document text
- http://fipuxogililego.epizy.com/52299058481.pdfIn PDF document text
- http://lepefefila.epizy.com/mymathlab_answer_key_elementary_statistics.pdfIn PDF document text
- http://balazetesu.epizy.com/11465402061.pdfIn PDF document text
- http://bedekopezedegej.rf.gd/barimuvipexolunusiti.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_off0000e37b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE37B	5304 bytes
SHA-256: `483c4fa7b8e41c1c8248a37d14c3856989519dd3a047376d34d8cf9f48e98fc3`
`font_01_sfnt_off0000f57f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF57F	11012 bytes
SHA-256: `828cc9cf0c4a879d9cf8f1cfb03efaeef2f9305f87af3f6c77ed4236dbda59f6`
`font_02_sfnt_off00011ab4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AB4	16480 bytes
SHA-256: `644cef6437cf227131dff6a8f8b7c6c04fae70cce72722c38eec926964cb8ce4`
`font_03_sfnt_off000130d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130D4	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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