Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9e16db0f753fc6…

MALICIOUS

PDF

60.5 KB Created: 2020-07-20 15:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 094c612d8cca01aec545d731f86eee58 SHA-1: 822bcd9cf22071b3ca32edb9b9550323fa167acd SHA-256: 5b9e16db0f753fc6a637a7311e6d75e7bb01881c03df81c99628c7636a1ee82f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one specifically pointing to a redirector associated with malicious activity, disguised as a download for 'joker slot apk'. The heuristic firings indicate this PDF is a malicious redirector and part of a link farm, strongly suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the nature of the links and the ML classification point towards a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=joker+slot+apk+download+ios
    • http://files.nxtgenerationenergy.com/uploads/1/3/2/7/132740415/sodegebu.pdf
    • http://files.robertsmetz.com/uploads/1/3/2/6/132682204/685708f34dffd78.pdf
    • http://files.arkansasdreams.com/uploads/1/3/1/3/131383514/muvexoj_jazurifogar_zulubotorubal_wevoxalawim.pdf
    • http://files.graevesautoandappliance.com/uploads/1/3/0/7/130739883/716f4b516d7.pdf
    • http://files.streetdreamcreations.com/uploads/1/3/0/7/130776655/lotabaxev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2560/files/26842891123.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/44550061007.pdf
    • https://fojosazekew622645149.files.wordpress.com/2020/07/ruvofomirakigefegunujoloj.pdf
    • https://wafujevu.files.wordpress.com/2020/06/mufulegidupepoladereke.pdf
    • https://xunanus28150752.files.wordpress.com/2020/07/bosofexisupuzexu.pdf
    • https://bujajobozow.files.wordpress.com/2020/06/zotufiluli.pdf
    • https://vosivulapib.files.wordpress.com/2020/06/81945507057.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/metiliwetizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/ferugutidofaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9408/9635/files/xolekewuwigomorojenexaboz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/71083341768.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4967/files/gafisagifewuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/46965596555.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/3362803533.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/64966757070.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/21072595917.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000896c.bin
69a20bd9c934f3d26d1ac3d4c5958ef4d123bbb56c502ad657279c7bfd7691f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896C 4888 bytes
font_01_sfnt_off00009a1d.bin
4f1221d8dbb9f1ff3e0301e33446d69eae379d6ca0173dda73cc8ad2106cca95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1D 3828 bytes
font_02_sfnt_off0000a879.bin
349225415758e6516fe13e8e28f220c0f79692b5b5582e976c9adc9ca09021f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA879 10208 bytes
font_03_sfnt_off0000cbb6.bin
95fd4d4fee5702f75d1d7c7225f215fee7584daf4a1af5a7e749e03d3586eb0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB6 16968 bytes

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