PDF malware analysis — malicious · ab9a251796bbd53d

MALICIOUS

PDF

83.2 KB Created: 2021-05-20 21:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: c515b90d3a9430cf1f98c7f3b94c8147 SHA-1: d1f91f4d07988ed40ad695f36a148728220a18dd SHA-256: ab9a251796bbd53d10abc2bf75c883bdbd1a9ef71b30308da3bd28a426fa4eea

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which point to a redirector URL designed for SEO link farming and phishing. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a malicious intent to redirect users to potentially harmful sites. The ML classifier and ClamAV detection further support the malicious nature of this file, classifying it as a phishing trojan.

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://druttle.ru/strik?utm_term=toss+the+turtle+hacked+unblocked+games+66 PDF link annotation
- https://static.s123-cdn-static.com/uploads/4450040/normal_5fce57bfbee3d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4443354/normal_606382278e518.pdfIn PDF document text
- https://bijesuvudapij.weebly.com/uploads/1/3/1/8/131860553/vijunabewoxopir-vemopobogi.pdfIn PDF document text
- https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/gerinimodi_kokadagaz.pdfIn PDF document text
- https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/5369825.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379385/normal_602265a30c671.pdfIn PDF document text
- https://fisuzawagowesus.weebly.com/uploads/1/3/1/8/131857314/silosivu.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/muvemasoxaji/66254732057.pdfIn PDF document text
- https://s3.amazonaws.com/dowadotiju/google_sheets_api_v4_c.pdfIn PDF document text
- https://s3.amazonaws.com/lodazojamuva/newborn_jaundice_guidelines.pdfIn PDF document text
- https://s3.amazonaws.com/begijufadi/87891319641.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2476e3a3-9557-417d-b417-0f014dd7c93c/raxanenazen.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d1c5478-f773-4c5e-a093-c3623a3034d6/ms_project_download_with_crack.pdfIn PDF document text
- https://s3.amazonaws.com/xapota/enadu_news_paper_telugu_today.pdfIn PDF document text
- https://s3.amazonaws.com/muvazi/how_to_update_line_6_hx_stomp.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cefa6b29-b403-4e4d-b186-23b633658f8d/kitchenaid_mixer_professional_600_glass_bowl.pdfIn PDF document text
- https://s3.amazonaws.com/gavapozalilup/aha_guidelines_atrial_fibrillation_cardioversion.pdfIn PDF document text
- https://s3.amazonaws.com/tirimofufemukat/vudunefovogijexipuzuse.pdfIn PDF document text
- https://s3.amazonaws.com/suxuzubojut/android_screenshot_app_without_root.pdfIn PDF document text
- https://s3.amazonaws.com/sosupejuxofedo/video_editor_online_android.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_off0000f860.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF860	5496 bytes
SHA-256: `3bae95076ba49f909be386b8705c1e5c7069ce5dcdeda858f4c292acce4ec8ba`
`font_01_sfnt_off00010adb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ADB	11256 bytes
SHA-256: `141243249823e866c1ae5b33803c3438077ad9917fe37188f415119c3894cb84`
`font_02_sfnt_off00013175.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13175	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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