PDF malware analysis — malicious · ab406af32ae9dd79

MALICIOUS

PDF

97.9 KB Created: 2021-03-25 12:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: e5ea5942bbb001f181ebba43d5beed23 SHA-1: 91d41e9e46ca36077b0511fd55d50a40183fb1e7 SHA-256: ab406af32ae9dd79b2b10d2c40f787def12172597d0f8b6ddd62cfc049718e35

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are SEO-optimized and redirect to potentially malicious sites, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with phishing or malware distribution campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://dugedepap.ru/123?utm_term=ibd+treatment+guidelines+uk PDF link annotation
- http://ersoil.fun/who_all_died_in_the_percy_jackson_seriesucuyy.pdfIn PDF document text
- http://kefutegi.iblogger.org/washington_redskins_record_2017.pdfIn PDF document text
- http://jewlgems.com/neworaxodewekew1r8c5.pdfIn PDF document text
- http://takovod.66ghz.com/cervical_spine_mri_guidelines.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
- https://s3.amazonaws.com/lakujusitejojet/how_to_replace_a_jetted_tub.pdfIn PDF document text
- https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_4b8badc24cc341c69c270be7df991dcc.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jolituzoji/55340128288.pdfIn PDF document text
- https://s3.amazonaws.com/woneketelak/catalogue_ikea_2016.pdfIn PDF document text
- http://mojenuj.atwebpages.com/xefasoxakugu.pdfIn PDF document text
- https://s3.amazonaws.com/putelekireza/93839814028.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8401fa0e-a60d-49c9-9b2a-3269b59f8387/vepifibu.pdfIn PDF document text
- http://gubadix.epizy.com/bollywood_love_romantic_movies.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5d134ce1-8cf7-43d9-9293-06eeb160cb0c/49990061254.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/062b6312-1878-4c11-a9df-45fb70404923/50348329000.pdfIn PDF document text
- https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_690645c1c38142cfb32a13f891fc9dba.pdf?index=trueIn PDF document text
- http://nujilexulajuwup.atwebpages.com/magnavox_dvd_recorder_vcr_zv427mg9_remote.pdfIn PDF document text
- http://bigapenegig.atwebpages.com/sailor_moon_manga_vol_1.pdfIn PDF document text
- https://s3.amazonaws.com/jemazejodep/pufoboxekaxupudomejakiwu.pdfIn PDF document text
- http://pekamidakoj.atwebpages.com/72264383258.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_off00013434.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13434	5056 bytes
SHA-256: `adcb7b0335c67983fa0e3ec7831b1c6c3e38f12d95543fe48bae180fe335c24f`
`font_01_sfnt_off00014540.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14540	11552 bytes
SHA-256: `64313e607623b608312c2fdf71523acbf2fc068cb8e0a0486a39fb06e56cf431`
`font_02_sfnt_off00016c1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16C1A	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

Open this report in the interactive analyzer, or submit your own file for analysis.