Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b81eb33fb174dbb…

MALICIOUS

PDF

51.0 KB Created: 2020-10-26 21:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c160148d7c4d30f88853d06c8039ed8a SHA-1: 96c50b1968a5ee27a36ffe18cdf26543cd5fdc68 SHA-256: 0b81eb33fb174dbbcc021604418b10f396348a59eae374ce3e7e07c02ebfef47
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated but contains the malicious URL, suggesting a phishing or malware distribution attempt.

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.club/123?keyword=freedom+rock+tipton+iowa In PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/7fdaa697.pdfIn PDF document text
    • https://movidotibapokab.weebly.com/uploads/1/3/4/2/134265591/8070628.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1502835.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/8620162.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/acc0a52.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/9690232.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/1a26d9.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/1/0500/1392/9630/files/advanced_image_search_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3184/4771/files/vintage_paper_napkins_and_tablecloths.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/3940261563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/gugavasaterawazirunil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8678/3673/files/in_the_snow_word_whizzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/42962193692.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/josobunilezebozasezefoxip.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/62756425995.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/65098093214.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/wumilopukude.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/carbohydrate_metabolism_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/eloge_de_l_amour_alain_badiou.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/fejapagixazo.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/gk_power_capsule_2018_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/lowawaredavijon.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/83481466922.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_off00007d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1B 4908 bytes
SHA-256: 724b922f9a1afeda534e5d72e85cecf07f8e6e47d49cdab4972617db878af1c9
font_01_sfnt_off00008dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBD 10144 bytes
SHA-256: a65b4fc5a7ed5a73813383e77f93df330895a66031e0da021d4516d947f250f9
font_02_sfnt_off0000b03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB03D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.