PDF malware analysis — malicious · b8e42d48196015aa

MALICIOUS

PDF

87.1 KB Created: 2021-04-04 08:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17

MD5: 94514e0725728f3c265dc24f79e8b8e1 SHA-1: 5de7b5ac052cd425f8ef8cae306654509a2b751a SHA-256: b8e42d48196015aac5d77e7c94882e9991bc0f7022139235e564fbfd22dec0c5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of external URIs and the overall structure indicate a phishing or content distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://mezovuduw.ru/wix?keyword=radian+graph+circle PDF link annotation
- http://todayshop.website/how_to_fix_a_stove_top_element09nmo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365639/normal_60672a426fe58.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452607/normal_6064a718c6b6e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471256/normal_6064f63f14593.pdfIn PDF document text
- http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
- http://sun-italy.space/5022429947876l8a.pdfIn PDF document text
- http://yildirimotobursa.com/718431435057wuvm.pdfIn PDF document text
- https://cdn.sqhk.co/gonuromabime/4jcidDH/dilomexajaw.pdfIn PDF document text
- http://mihetos.xyz/bivijixofadupifexaj0pr9l.pdfIn PDF document text
- https://cdn.sqhk.co/xanikadir/XgdjjOZ/sell_old_video_games_near_me.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366043/normal_6037c2282dfc0.pdfIn PDF document text
- https://cdn.sqhk.co/vakolitakap/cfihgdr/best_birthday_cake_ideas_for_husband.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/defipedibe/japar.pdfIn PDF document text
- https://s3.amazonaws.com/xonobijikivo/rejogiwux.pdfIn PDF document text
- https://s3.amazonaws.com/serogajugomiji/poxofugesetaxovil.pdfIn PDF document text
- https://s3.amazonaws.com/kuxegu/84593017792.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/89587865-4aad-42de-b2a4-f39bfba0e88d/should_i_read_the_lies_of_locke_lamora.pdfIn PDF document text
- https://adea4596-07c4-4c45-ba97-107779ed6dc5.filesusr.com/ugd/5bd9e2_e3445bc2f6c4428cb602a07072afedf4.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sojebelevenex/50772586721.pdfIn PDF document text
- https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_b0d7b789146e4991ad65182bffbdd3c4.pdf?index=trueIn PDF document text
- https://c93ae04b-3d95-4128-ac62-0503c91a26e1.filesusr.com/ugd/002f5e_adb272e2a3b94d6aa98a687dfb1a3ab7.pdf?index=trueIn PDF document text
- https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_b9ac9b387a754dc7b5845ae557dd2a99.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0720dc31-176e-497d-be17-d6ed9134839b/4836347801.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_off0000f380.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF380	4764 bytes
SHA-256: `dc08c5a645ecf9d497424f9055e7d37e3eccf8ca06ccabce3e267132592afa9c`
`font_01_sfnt_off00010398.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10398	11096 bytes
SHA-256: `f4c055d56d3cd62223f59d79a7937a62cc8b5e34f35b26870f242036dde3aced`
`font_02_sfnt_off00012987.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12987	16296 bytes
SHA-256: `d5ba6d66c3b13f33ff65e5ab89598ad158011f02ec2133c7a5bc162e79422677`
`font_03_sfnt_off00013f00.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F00	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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