PDF malware analysis — malicious · db8d910c3cc6f4b3

MALICIOUS

PDF

75.9 KB Created: 2021-02-16 04:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 01ed73103277575930e5c8f39f184423 SHA-1: 4c873603d168f73aeb2c30d16727f18f54758d3c SHA-256: db8d910c3cc6f4b3026a308ba3e5790e246b595ac6b820af6b11a7a2867f85a5

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a significant number of external links, many pointing to disposable domains and Weebly hosting, indicative of a link farm. The presence of an embedded URL and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to redirect users to a network of other sites, potentially for SEO manipulation or to host malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://druttle.ru/123?utm_term=ge+appliance+repair+customer+service+number PDF link annotation
- https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/vifow.pdfIn PDF document text
- https://dexuruxewiripo.weebly.com/uploads/1/3/2/6/132682754/pixefipuriwi-zagaparoxatu-pogozesilojepe.pdfIn PDF document text
- https://cdn.sqhk.co/vujenibolo/bGgji4a/math_tricks_with_number_9.pdfIn PDF document text
- https://volafonozus.weebly.com/uploads/1/3/0/7/130775232/5392184.pdfIn PDF document text
- http://siankaanmexico.com/prince2_agile_foundation2kjy9.pdfIn PDF document text
- http://taptopbot.com/razajonimefafupometn7jc4.pdfIn PDF document text
- https://cdn.sqhk.co/daxerarugak/BuGXjaQ/virtual_families_2_walkthrough.pdfIn PDF document text
- https://cdn.sqhk.co/xoraxuvonaf/i8haOhf/rutisoxitedasizisudetu.pdfIn PDF document text
- http://oneplusonemain.xyz/xuwusewm20bw.pdfIn PDF document text
- http://zopetiwan.22web.org/17793322825.pdfIn PDF document text
- https://cdn.sqhk.co/nuxoporerom/jdzMFhb/shipwreck_island_miniature_golf_myrtle_beach.pdfIn PDF document text
- https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/zogobogesikonij-salawe-kagopus.pdfIn PDF document text
- http://figojusu.iblogger.org/taxes_subsumed_under_gst.pdfIn PDF document text
- http://lg-copyright.com/kubebadonhdtf2.pdfIn PDF document text
- https://cdn.sqhk.co/sadirorig/ihibFgd/homeroom_guidance_images.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://zopefunexot.epizy.com/43322004343.pdfIn PDF document text
- http://rogoxeruf.rf.gd/37484765194.pdfIn PDF document text
- http://jojexapopexevof.epizy.com/segizawuwedokul.pdfIn PDF document text
- http://numebazo.rf.gd/zokezizuvefoze.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_off0000dcff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCFF	5192 bytes
SHA-256: `b9b6f31a8cfff900b9d5e2bdb0eadc7725892fda062841fd8aaf7126a7b978f6`
`font_01_sfnt_off0000ee92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE92	11300 bytes
SHA-256: `add1d21de41922e1920ce22980b7234bc989234259d8f13f3160489e52ed9a26`
`font_02_sfnt_off0001138b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1138B	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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