Malicious PDF — malware analysis report

Static analysis result for SHA-256 df03d2477bb16192…

MALICIOUS

PDF

34.8 KB Created: 2020-10-29 08:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9de4e027284404f9152deb31e5a68469 SHA-1: d1ee4b93da9ab763878e0c1f6699a29a2184a000 SHA-256: df03d2477bb16192b10d3a210b2ffec2358f36171f069815b6c5fc446b71308f
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 known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to drive traffic to malicious sites. The presence of numerous PDF links suggests an attempt to distribute further malicious content or phish users.

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/strik?keyword=sweep+series+pdf In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/61f82309.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/wotaru.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/9d26b8b8.pdfIn PDF document text
    • https://refaxezadale.weebly.com/uploads/1/3/4/3/134325555/figezuwaweto.pdfIn PDF document text
    • https://xepajozojiv.weebly.com/uploads/1/3/4/4/134476610/a7ebd6f110a3.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/f32a19ad1.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1d44b872.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/7160210.pdfIn PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/pilil-mosoxewigomid-tipalew-memabeg.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/1174c344b49.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/gotenukevepunin/6306992501.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/ontario_immunization_schedule_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/concatenate_list_python_int.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/law_of_adverse_possession_in_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7362/6810/files/download_game_android_mmorpg_terbaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1800/1825/files/skype_android_white_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/contoh_amdal_pabrik_karet.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/30060948308.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/cpap_nightstand_white.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/buferopotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2991/2488/files/30300519709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8086/8528/files/36398868644.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_off00004eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAC 4988 bytes
SHA-256: ab968e0a2f9ec016e6da5347d825c12af695db09fb9f1584f1cc3abbaaeedc53
font_01_sfnt_off00005fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 8864 bytes
SHA-256: 218cd8a9c6e455bf1e8b19588f071b99b48fb67aeb763c671a9816f6635cf653

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