Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac4839b5314a00c…

MALICIOUS

PDF

57.2 KB Created: 2020-11-09 06:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1784dbb2ba493b9381a02c97a5482d58 SHA-1: 1a3019b4e41357027ecaf63e7726d0105e481f25 SHA-256: bac4839b5314a00c48ac6fa09c015c2a6389f606b4b399016c2464b58f925d0d
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to link farms and redirectors, indicating a malicious intent to drive traffic to potentially harmful sites. The embedded URL, 'https://traffking.ru/123?keyword=city+of+san+diego+standard+drawings+2018+pdf', is explicitly flagged as malicious. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure.

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://traffking.ru/123?keyword=city+of+san+diego+standard+drawings+2018+pdf In PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/devufurakexibakefis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5f925a123d0b3.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/2970709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8f754327f68.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/wonoti/befiwuvafanonavaxerusez.pdfIn PDF document text
    • https://solavaje.files.wordpress.com/2020/11/35657448797.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/91_ford_ranger_manual_transmission_fluid.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/putlocker_harry_potter.pdfIn PDF document text
    • https://tapevekijadu.files.wordpress.com/2020/11/ocean_animals_worksheets_preschool.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://buvewefuwa.files.wordpress.com/2020/11/tipos_de_tinacos_de_agua.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/feature_and_editorial_writing.pdfIn PDF document text
    • https://rizogawer.files.wordpress.com/2020/11/82799598556.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/crossword_car_manual_topic.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/heating_lunch_box_for_car.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_off00008be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE9 5700 bytes
SHA-256: ff9133b6b869dbc548e58505cb669d6ac6f1eb5d28f61f271fcca9826a8020c5
font_01_sfnt_off00009f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7C 11724 bytes
SHA-256: cc85464e683cabbde6ca2dc36433aca2bf385a39ba3169570d4e008f64f16f96
font_02_sfnt_off0000c727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC727 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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