Malicious PDF — malware analysis report

Static analysis result for SHA-256 a328625b8eade26f…

MALICIOUS

PDF

42.7 KB Created: 2020-10-29 16:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a1a4a7d449cb535be1cacb6c84787e04 SHA-1: 92e96c1bdaa0446d9e60247e85e1d706e7586dbb SHA-256: a328625b8eade26f94304a13fd189c41eec942e2d6e9602da76d8a9517d43efe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/123?keyword=maquia+when+the+promised+flower+blooms+full+movie+dubbed In PDF document text
    • https://gunapozebufe.weebly.com/uploads/1/3/4/3/134316646/vatujezososoru-jikafitifomap-kigiwex.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/sufikijuvolibup-sumikaturuxamos-rerin.pdfIn PDF document text
    • https://velulaganivuvoj.weebly.com/uploads/1/3/4/4/134438708/xezatute_gegaw_jujupow.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/3761287.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/5114437.pdfIn PDF document text
    • https://vakesefujes.weebly.com/uploads/1/3/0/7/130739027/5486151.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://cdn.shopify.com/s/files/1/0467/7727/0425/files/28259231454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2116/3432/files/max_frisch_biedermann_und_die_brandstifter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4058/3061/files/how_to_make_a_voxel_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8411/9711/files/66962002935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7527/9283/files/72869911100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9016/8987/files/40684678995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7276/5083/files/gcse_maths_revision_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6109/9682/files/40147376264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3232/9371/files/english_language_proficiency_standards.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_off00005611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5611 5588 bytes
SHA-256: 8b7b7c05844ea24c6d31b1e52c59172592c590bfa3a7207de8a529b3c4dd6e18
font_01_sfnt_off000068f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F0 11388 bytes
SHA-256: 7d21a54383f81ea3b8801d86431c0be1b2f048b98eae2b62b21830c88c1cf302
font_02_sfnt_off00008f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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