Malicious PDF — malware analysis report

Static analysis result for SHA-256 972450cb4c7dcdb5…

MALICIOUS

PDF

46.5 KB Created: 2020-11-02 17:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3835da3aef04d52281dccc1508880a58 SHA-1: b9bd44b7ae207a3a51dea452e75358de194317b0 SHA-256: 972450cb4c7dcdb5df18f2b7e8006febbadaea9c604c814e8ad0ec62f9d41231
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, many of which point to redirector infrastructure. The document body text, though heavily obfuscated, includes a URL that appears to be a lure for 'home depot my apron'. The presence of a malicious redirector link and a link farm suggests an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/aws?keyword=access+home+depot+my+apron+from+home In PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/bixowe.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/5ef07c25ec89c5b.pdfIn PDF document text
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/de42d62d92.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/f2dd59b8995f0e5.pdfIn PDF document text
    • https://noxurujoba.weebly.com/uploads/1/3/4/3/134384046/wumafa.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/viromibukoleliw/jetuluzikudanigelaxolusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f77585b-6316-45c8-b361-3442ccaed1f4/devemokevajonikalulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7410/0634/files/prolonged_jaundice_screen_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/45095566090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283156fb-6f7a-49fa-b447-693ce5488c91/how_to_shoot_a_recurve_bow_without_sights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a47a327-1845-4183-856a-0ace01731d13/minecraft_pe_v_10.5_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/definition_of_intermembrane_space.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57261663-bcd1-4b7b-9f7e-2f8e9309ebe7/malosenalodatajefimib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bca9cb4-956b-4d92-bc03-ca2eae571bb0/goddess_of_yesterday.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.

FilenameKindSourceSize
font_00_sfnt_off00006792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6792 5192 bytes
SHA-256: 46734689e5560751c73135dc489b38ded62036a894d035d673f40961552da988
font_01_sfnt_off00007908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7908 11100 bytes
SHA-256: b44513b548089e2951494adc153bfeed0a1a6a073df4b02ab4b2e001572769b9
font_02_sfnt_off00009edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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