PDF malware analysis — malicious · 5c5d3ca915f6b0d0

MALICIOUS

PDF

81.8 KB Created: 2021-03-19 15:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 0979b9ccdfd9a12f7ac56f4ff5a62bbc SHA-1: b62cdcf21b9a395df6a037b88ce5d9677e736010 SHA-256: 5c5d3ca915f6b0d02cfc37fe1167c7464fdc58eaa3807c008c93e1fb666aa777

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a link farm and an SEO redirector, suggests an attempt to lead users to malicious websites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a common pattern for phishing or malware distribution via embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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=canon+powershot+a1200+hd PDF link annotation
- https://degovemidim.weebly.com/uploads/1/3/4/0/134017519/2017535.pdfIn PDF document text
- https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/getusepovisu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475208/normal_604b80ff0b3a5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450512/normal_5fff26eb971d7.pdfIn PDF document text
- http://nibumuxadata.66ghz.com/contenidos_actitudinales_procedimentales_y_conceptuales.pdfIn PDF document text
- https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/fb65530428a4f.pdfIn PDF document text
- https://tituwuvosaladu.weebly.com/uploads/1/3/4/8/134849885/batex.pdfIn PDF document text
- http://zubosoxi.22web.org/cartoon_movie_free_300mb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417221/normal_5ffb30150a14b.pdfIn PDF document text
- https://pusuranan.weebly.com/uploads/1/3/4/5/134598414/0f714.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408871/normal_6014812fea861.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/sojebelevenex/defense_mechanisms_handout.pdfIn PDF document text
- https://s3.amazonaws.com/xumakomowi/kazusufodole.pdfIn PDF document text
- https://s3.amazonaws.com/xedewofuretujo/cover_page_design_template_coreldraw.pdfIn PDF document text
- https://s3.amazonaws.com/jinabom/48460837728.pdfIn PDF document text
- https://s3.amazonaws.com/vonusirukete/rajomafetetomiwiso.pdfIn PDF document text
- https://s3.amazonaws.com/faluzotixupi/62737260544.pdfIn PDF document text
- https://s3.amazonaws.com/zaxawetawupo/gelikopabutoweweguvufi.pdfIn PDF document text
- http://woduzubede.epizy.com/killing_eve_episode_2_parents_guide.pdfIn PDF document text
- https://s3.amazonaws.com/zosevid/zimutitakiluteke.pdfIn PDF document text
- http://junikul.epizy.com/lukiwaxikivuwofogixil.pdfIn PDF document text
- https://s3.amazonaws.com/jodabiladezot/81397772144.pdfIn PDF document text
- https://s3.amazonaws.com/bezutu/avery_templates_for_word.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001022b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1022B	5336 bytes
SHA-256: `d04ff96ee1887105a15cbf4fe3007cf4a73170851ea871be215a72be5b77e1bb`
`font_01_sfnt_off0001145e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1145E	10976 bytes
SHA-256: `ba158e3cbd02ad872a16999a05bb4c906c2a9185b960faaf6d473e25cfeb2165`

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