PDF malware analysis — malicious · e981e39d6fdbf520

MALICIOUS

PDF

80.7 KB Created: 2021-04-02 12:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 76637298eae03d75b027ce4caeecb30b SHA-1: 2bbb90254952145e17a8abc197e7a0e9df7ce1f8 SHA-256: e981e39d6fdbf520fbf0750751c90d56ede0fe751d5d61820850f618eb455baa

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous heuristics indicating it is designed to link to external content, specifically identified as a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK'. The primary malicious URL identified is https://ponafet.ru/wix?keyword=this+is+the+only+level+3+stage+25, which is likely used to redirect users to malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', reinforcing its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=this+is+the+only+level+3+stage+25 PDF link annotation
- http://jofifuneku.medianewsonline.com/10349547615.pdfIn PDF document text
- http://fasoxuxesatilu.sportsontheweb.net/hvac_meaning.pdfIn PDF document text
- http://katipef.medianewsonline.com/pathway_aterosklerosis.pdfIn PDF document text
- https://lodipopigib.weebly.com/uploads/1/3/1/8/131857338/94651.pdfIn PDF document text
- http://usejus.pro/can_a_woman_gain_muscle_after_40i8j1n.pdfIn PDF document text
- http://lupazul.mywebcommunity.org/gadove.pdfIn PDF document text
- http://legendnat.space/gonzalez_microwave_transistor_amplifierspknxo.pdfIn PDF document text
- https://mejulima.weebly.com/uploads/1/3/4/0/134040536/fukubazogi-gisopebepetive-zafapuvu.pdfIn PDF document text
- https://dojepojejexun.weebly.com/uploads/1/3/4/6/134668276/pexuvisez_pilal_vukuzerafure_deligularun.pdfIn PDF document text
- http://consumer-data-protection-bureau.com/75731943641w3hyg.pdfIn PDF document text
- http://nesarose.sportsontheweb.net/nosagodenelifarulaleleji.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/busutafitufe/masterbuilt_electric_smoker_400_series.pdfIn PDF document text
- https://f19d2187-ce67-4d04-8798-eef694565169.filesusr.com/ugd/bd4746_1f55eeb90f1942debb28630d3eddc898.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jezobasit/what_are_3_destructive_or_negative_effects_of_volcanoes.pdfIn PDF document text
- https://s3.amazonaws.com/gezejoputiwinu/kadepoxamuj.pdfIn PDF document text
- https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_917f152b90dc4f05899cf59af4af3e99.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/zarelusipofox/pregnancy_blood_test_results_template.pdfIn PDF document text
- https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_e4890a183ed641388a4fbd40f687cdd7.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://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_off0000ef6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF6B	5172 bytes
SHA-256: `868c1104b58c7002bc4c821434587ae4bdd0aa7675de859957055b306aa0575c`
`font_01_sfnt_off00010100.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10100	11348 bytes
SHA-256: `1ed39da76c07fcfdbbf0cc4a0f8e8f4a0ded2d23c9b8dc2e909a524591555ae3`
`font_02_sfnt_off0001278c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1278C	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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