PDF malware analysis — malicious · 2ec1a231ef06d62d

MALICIOUS

PDF

89.3 KB Created: 2021-03-31 11:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: dbc72a9d05bc34f8e1dd537ab3abe34c SHA-1: 5b7bbe0952ee9e1fa8706e7be2620348a8bccc34 SHA-256: 2ec1a231ef06d62da77037c92e9cb7687073ffddaaa24f4ba8469fb28ae865bc

194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://crophysi.ru/wix?keyword=darood+tanjeena+short PDF link annotation
- https://cdn.sqhk.co/mezewimaxus/fhhIUgj/fish_aquarium_video_hd.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4425506/normal_5fc812bb7b8a6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489240/normal_604b57658a6e0.pdfIn PDF document text
- https://cdn.sqhk.co/zinoliwomi/SghXNhc/petsmart_bird_leg_band.pdfIn PDF document text
- https://cdn.sqhk.co/giganopof/fABifrX/pebero.pdfIn PDF document text
- https://cdn.sqhk.co/timafewa/bUSnzXR/colornote_pc_login.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369769/normal_605e0e97621b6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4448735/normal_5ffdaa152befd.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4367313/normal_5feb8bc37c0ee.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369158/normal_6060d9a20ffa7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455198/normal_60413e20a07b3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4463287/normal_60026058a50b3.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/6bed993c-f078-42ff-b7e8-45529d8bcc8c/zonemev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7ead792f-2f9f-4ecd-b3ed-37277fffecc2/how_to_fit_hybrid_lnb.pdfIn PDF document text
- http://gewuruso.epizy.com/adobe_reader_version_history.pdfIn PDF document text
- https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_63d0b758e772450b9216b966e67061e1.pdf?index=trueIn PDF document text
- http://jajopotisariko.epizy.com/bijud.pdfIn PDF document text
- https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_0d6a9e8d8cfe4259ab29885b00c58696.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
`stream_004_off000128b2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x128B2	25148 bytes
SHA-256: `eee3a4e2eba2687c56af66fa9d0a8f1b49f8beb3a7ae03f53e5889aff7e3571f`
`font_00_sfnt_off0000f11a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF11A	4956 bytes
SHA-256: `265d7f393ff74b0591f96105f64167d8a3ee9c8439eea9abd1b6e22fabaa986c`
`font_01_sfnt_off000101f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101F5	11800 bytes
SHA-256: `6f9f7e33b3c2dd6a332ab1d361ab1fc5385402cc56bebafc5f41849848b860fd`

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