PDF malware analysis — malicious · ecaad8ffb3add585

MALICIOUS

PDF

91.3 KB Created: 2021-04-07 10:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 2927000ed74369658327755691b3552b SHA-1: 21c4253979fb7c7a7db555fb8230553f2c73662c SHA-256: ecaad8ffb3add585a6e754a29541aa82579df4384ea8e939686298aac632e83f

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to what appears to be a link farm designed for SEO manipulation. One prominent URL, 'https://gimoguvi.ru/strik?utm_term=how+much+is+arby%2527s+buffalo+chicken+slider', is identified as a redirector, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://gimoguvi.ru/strik?utm_term=how+much+is+arby%2527s+buffalo+chicken+slider PDF link annotation
- https://wikojenuvovada.weebly.com/uploads/1/3/4/2/134266286/3bc07187fa3737e.pdfIn PDF document text
- https://felixitu.weebly.com/uploads/1/3/4/0/134012625/493ca0aa008.pdfIn PDF document text
- https://luxovifawus.weebly.com/uploads/1/3/4/3/134341193/fazoxab.pdfIn PDF document text
- http://how2clever.com/stock_market_real_time_graphlnm70.pdfIn PDF document text
- http://mestikon.online/sonic_menu_specials_20207dm76.pdfIn PDF document text
- http://homiak.fun/jepelif2507c.pdfIn PDF document text
- https://lewibodozibepa.weebly.com/uploads/1/3/3/9/133997785/9a44d611c1510.pdfIn PDF document text
- https://rixatesar.weebly.com/uploads/1/3/1/8/131871899/6222211.pdfIn PDF document text
- https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/c17cf2645.pdfIn PDF document text
- https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/1704059.pdfIn PDF document text
- https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/xigedinajuzule.pdfIn PDF document text
- https://bobiputab.weebly.com/uploads/1/3/2/8/132814039/8c8572d07d4453.pdfIn PDF document text
- https://lotigasi.weebly.com/uploads/1/3/4/7/134705720/xutupogan.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/genedesowul/febasusafipafixetaramer.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0175a08f-4258-4f56-a94a-1e71f9f8f7e4/sunidi.pdfIn PDF document text
- https://s3.amazonaws.com/wanalovum/peter_pan_collar_pattern.pdfIn PDF document text
- https://s3.amazonaws.com/jusagi/japanese_slot_machine_tokens.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4ca3d5cd-4b8b-44d3-9894-2f01e72d558c/40253449493.pdfIn PDF document text
- https://s3.amazonaws.com/lanaladu/addicted_novel_free.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_off00011142.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11142	5456 bytes
SHA-256: `23776b333bb2544bb3c941d2eabf9bfe11c37853a782a7f483b6bb06796e9310`
`font_01_sfnt_off000123b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123B6	13896 bytes
SHA-256: `d089e0efb5c49fe82ee64a81b9d9109764765b9892fc561f3077c2b2a7437bb2`
`font_02_sfnt_off00015177.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15177	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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