Malicious PDF — malware analysis report

Static analysis result for SHA-256 012250a287a87edb…

MALICIOUS

PDF

110.8 KB Created: 2020-08-11 04:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07eb43b6b41494cc4d9abb895b71c9fe SHA-1: fce4815abbc27b41f7cd7c6aa21a42d660ac48aa SHA-256: 012250a287a87edb6c08b5fe32430c2464db6fee021cc444b9f6185c2e256494
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with the primary one identified as a malicious redirector. The document body, though partially garbled, contains the text 'List of common acids and bases pdf' and the malicious URL, suggesting a lure to download a seemingly legitimate PDF. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=list+of+common+acids+and+bases+pdf
    • http://gabik.englandaccounting.com/uploads/1/3/0/8/130874493/dotaroxez-jesegomofurez.pdf
    • http://files.homersfund.org/uploads/1/3/0/7/130739204/gixevata_vogosonefepe.pdf
    • http://files.cliftonrefugeesponsorship.co.uk/uploads/1/3/2/3/132302883/771301.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/2131/8818/files/lagonifemurol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/rojeji.pdf
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/basic_digital_electronics_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/athlean_x_90_day_program_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/cds_exam_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9142/6469/files/basic_isometric_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/kalabhairava_ashtakam_lyrics_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8326/7236/files/34745371169.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/appsc_panchayat_secretary_previous_papers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/7692/5078/files/watch_j_dorama.pdf
    • https://cdn.shopify.com/s/files/1/0446/3670/0835/files/couper_gratuit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014325.bin
d0763fbd271711262b0a26362cc9c99fb155632731fabfacbbfc72efdb3f7c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14325 2912 bytes
font_01_sfnt_off00014d88.bin
67bb419db254c240f269834ce9455a52b699514fdb1394a67abbcae825052c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D88 5044 bytes
font_02_sfnt_off00015e8a.bin
8f8d814d3d2423af2c86d8fca92df49952d5d433283670a8467540eec0a94321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E8A 13244 bytes
font_03_sfnt_off00018943.bin
99a79d9109d1afeb679b26572aadcc1a8004b9462475e93ad348fc9a35c4d6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18943 16288 bytes
font_04_sfnt_off00019eda.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19EDA 4324 bytes

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