Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0ba7bbf984c217…

MALICIOUS

PDF

48.8 KB Created: 2020-11-01 03:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d6465cb824e2c9ef8abb58bd36ca5e51 SHA-1: 496397af0198c9f45a71fbc7c6e4714b358ac3ae SHA-256: 0b0ba7bbf984c21766a30840f9e92828ee5c52338633a32cd88ff472edcf1524
154 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, identified as a link farm, with one URL pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the primary attack pattern appears to be the distribution of malicious links disguised within a document, potentially leading to further compromise.

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://ttraff.cc/123?keyword=ffxiv+white+mage+guide+stormblood In PDF document text
    • https://mepetimis.weebly.com/uploads/1/3/1/4/131483418/4460890.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/2311382.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/mujevubutukoxu/calendario_premier_league_2018_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ae562e-81c3-4d1d-a703-e5bfe288ce23/vivuxelofomatokabim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2edf6e6-84bd-42f0-90f1-b37bd9b4998e/fezamadesolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7171/9574/files/imperial_armour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9810/6776/files/custom_cloth_napkins_wedding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5502/8661/files/panasonic_eco_drive_inverter_washing_machine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc25d202-2559-4014-828f-a04307087689/44025155833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90dc476f-5f34-4d8b-bbdc-3e3f3fd8c291/gogolijofuwep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9416/2621/files/tesajagenepiwuvukurowowe.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/fufasajatijix.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.

FilenameKindSourceSize
font_00_sfnt_off00007f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8D 5636 bytes
SHA-256: 912e553f2b6c217aac44dba991084e2af314a9a28736fb684f0c209e8af5722e
font_01_sfnt_off000092a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A6 10368 bytes
SHA-256: 84e2cf7277c341fc484693af9d75c6867c3a845fde7b7751287dab02726f4a02

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