Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d0aef4e0006d9a…

MALICIOUS

PDF

67.8 KB Created: 2020-04-21 08:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 314c2d8c4e672842e78b190a3fe395f1 SHA-1: a0499aafafbde15726242963a6ad41e98a277cd2 SHA-256: 57d0aef4e0006d9a0388335c2ec9746030dcc83010b6429e7394bb229ae90c30
94 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier with high confidence. It contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The primary attack pattern involves leveraging these links for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://hyperion-ai.com/uploads/1/3/0/4/130490776/130490776.html#l
    • http://bradzehr.com/uploads/1/3/1/4/131409597/2969242.pdf
    • http://concretesurfacesolutions.ca/uploads/1/3/0/4/130475918/2e25ba5f2f1.pdf
    • http://milexy.com/uploads/1/3/0/7/130738537/puwopi-ximigasuxufu-serami.pdf
    • http://cheaposnow.com/uploads/1/3/0/2/130271013/giliwolokulogame.pdf
    • http://caminsuranceagency.net/uploads/1/3/0/3/130323491/dapewafawili.pdf
    • http://orderyourbluebook.com/uploads/1/3/1/1/131164424/gapexazi.pdf
    • http://egglestonelectric.com/uploads/1/3/0/7/130775584/87cad.pdf
    • http://communitysupportedwomanhood.com/uploads/1/3/0/8/130874358/pinipigowe-gamezupixi-biluxe-motofabosepose.pdf
    • http://izzy-bees.com/uploads/1/3/0/4/130476760/818849.pdf
    • http://jstephenperry.com/uploads/1/3/0/8/130814308/mavaturapubexifezuz.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/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007541.bin
fa35606169434bcc948e7bdb498a98a96a0ba7d2d76dad3742971d1f173004ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7541 7080 bytes
font_01_sfnt_off00008764.bin
4ff9b0b4b1a96d2ab2cfa221c1fce8435dfc1e1eeb874d4dfb072d85624b35f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8764 2760 bytes
font_02_sfnt_off000092b4.bin
38ec7db5bbebfd7c21facfb2284853fcb46ebc064f3facbfe721491510ca492b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B4 6180 bytes
font_03_sfnt_off0000a177.bin
880ec8720db90722ef37b99933623c0a25fad7f28428f814de4773b0314dc8ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA177 9496 bytes
font_04_sfnt_off0000c4b9.bin
622dc6a3b679d27daed9240fa9434c6787e38dee0ddee0c9c1551393e2851f0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B9 3344 bytes
font_05_sfnt_off0000d08c.bin
9d0f6150b9252323a92d4525dcbd44e722fe2f27081ea1cb6d082f8be50bb66b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD08C 19428 bytes
font_06_sfnt_off0000f1b3.bin
bda9f67548f5577ce0fd6eb1de731398cd79ff24a2ba30c0e60943edc83306c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 6192 bytes

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