PDF malware analysis — malicious · a8f2581f4b9237f0

MALICIOUS

PDF

42.1 KB Created: 2020-11-06 03:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 88a2d12258d73c5b5c5091bcafbbebb3 SHA-1: 165faad2db5882c7f526bac1bd3642df0be0fec1 SHA-256: a8f2581f4b9237f05bf6d3a84d81b6fe1abf575d1998b3b1ab4174528b4a72f7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The document body contains text related to a forensic case and includes the malicious URL, suggesting a phishing or redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://ggtraff.ru/123?keyword=forensic.rice.edu+answers+case+3
- https://cdn-cms.f-static.net/uploads/4389387/normal_5f90199edb347.pdf
- https://cdn-cms.f-static.net/uploads/4366952/normal_5f950fdc0385c.pdf
- https://cdn-cms.f-static.net/uploads/4372105/normal_5f88ffd5492b2.pdf
- https://poxaneduwi.weebly.com/uploads/1/3/4/2/134234601/rarefufixeku.pdf
- https://cdn-cms.f-static.net/uploads/4366622/normal_5f8b844948ea7.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wuzalugiseto/print_blank_sheet_music.pdf
- https://uploads.strikinglycdn.com/files/368fbeea-fb24-423a-86f0-4a98ccbadd80/42845833149.pdf
- https://cdn.shopify.com/s/files/1/0268/7080/8765/files/konirudo.pdf
- https://s3.amazonaws.com/zufaxepixiguxax/lg_premier_pro_lte_manual_lml414dl.pdf
- https://s3.amazonaws.com/lodazojamuva/lowrance_elite-4x_manual.pdf
- https://s3.amazonaws.com/gezetega/30060144076.pdf
- https://s3.amazonaws.com/muvarelo/hudson_high_school_hudson_ohio_website.pdf
- https://cdn.shopify.com/s/files/1/0484/4909/3797/files/divisible_by_49.pdf
- https://s3.amazonaws.com/toguvaju/adding_and_subtracting_decimals_practice.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000064e9.bin` `d2686eba7a593e90c64b6ad5211426d9f00efaa753c4ebfa1e17bdba1d81f1d4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64E9	5144 bytes
`font_01_sfnt_off00007697.bin` `07ec46552705d50d5c100ae8eeb571f29e0c709b4528dd7560639276fd8869ff`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7697	10880 bytes

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