PDF malware analysis — malicious · 1eff30eb66c3d5c9

MALICIOUS

PDF

81.7 KB Created: 2021-03-28 13:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: a3fb8b909f61d1a5f55d261a892eec29 SHA-1: 52d9170678a828a87401736ca08a000adcde67ee SHA-256: 1eff30eb66c3d5c9ae447e09fcec41eb594d2cb4e3af1f5b91d04d674ae7ccdd

134 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 0.9991

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 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://fokemale.ru/123?utm_term=number+handwriting+worksheets+pdf PDF link annotation
- https://cdn.sqhk.co/fakosopalo/vzlGhig/hellhound_on_my_trail_fleetwood_mac.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444104/normal_600eb41e9cb18.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452386/normal_601531ba58f64.pdfIn PDF document text
- http://fitafipos.iblogger.org/32373901354.pdfIn PDF document text
- http://wododepovu.iblogger.org/awlgrip_topcoat_data_sheet.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470020/normal_601d3aab843a6.pdfIn PDF document text
- https://cdn.sqhk.co/fejipotegevi/hi3hdgg/5244898010.pdfIn PDF document text
- https://cdn.sqhk.co/moturalogupe/iHhj0gf/gixitatebixixe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500878/normal_6044754b0f190.pdfIn PDF document text
- https://cdn.sqhk.co/rogokivika/YFidjje/womuz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369185/normal_60135c1b3de87.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463272/normal_603962a440064.pdfIn PDF document text
- https://cdn.sqhk.co/sujubowip/jSjf9mE/gubegeb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444850/normal_603b7caaa117b.pdfIn PDF document text
- http://wixotuvotinunu.iblogger.org/16443412892.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://kasunes.rf.gd/22668827269.pdfIn PDF document text
- https://s3.amazonaws.com/sirilagewuga/seburaxusadidamixufufezav.pdfIn PDF document text
- https://s3.amazonaws.com/zidenigad/what_is_positive_and_negative_space_in_design.pdfIn PDF document text
- http://bemawom.rf.gd/47862321590.pdfIn PDF document text
- https://s3.amazonaws.com/fodose/atelier_ayesha_guide.pdfIn PDF document text
- https://s3.amazonaws.com/fejififimaketo/sexasiwotix.pdfIn PDF document text
- http://nadedafusefemej.rf.gd/nisijasojobelovawubedaguv.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_off0000e326.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE326	5688 bytes
SHA-256: `2f98b30a300cd3a3838bbd01b1078f58692613f2f07a06c46dfa15b574889a78`
`font_01_sfnt_off0000f65c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF65C	1800 bytes
SHA-256: `51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0`
`font_02_sfnt_off0000feea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEEA	10356 bytes
SHA-256: `69da90c10386d9a72e2df1465664e2a3baa39f8b32817e1337fc39f2fea06b4e`
`font_03_sfnt_off00012281.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12281	16312 bytes
SHA-256: `bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939`

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