Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ee03cb837e0b5c…

MALICIOUS

PDF

59.0 KB Created: 2020-08-23 19:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b53d1ed355141eb8bc6665e71e41b86b SHA-1: eb5da080a83f6fdfdbb835cb11e0d36db3df3d07 SHA-256: 65ee03cb837e0b5cd8ce7e0b08b597dc5ea7ffa2d9465c1d52bdfaee3b5b71e7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Sound of silence pentatonix', suggesting a phishing or social engineering attempt. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination, likely for credential harvesting or malware delivery.

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.ru/pify?keyword=sound+of+silence+pentatonix
    • http://files.eguastella.com/uploads/1/3/2/6/132682282/4291642.pdf
    • http://gamivuziv.twistedtreeyogaroom.com/uploads/1/3/2/8/132814930/bogoli-ribil-vekigazejuvakif-wanusutekipa.pdf
    • http://files.vnecessities.com/uploads/1/3/1/3/131384679/dudebujapama-zajaxikuxoge-berulosilepexo-wodidojefo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9024/5787/files/vifam.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/15631019809.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/banafubujuwusewuwila.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9099/files/bukhari_sharif_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/acme_thread_pitch_chart.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/wozipe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7755/6629/files/57644215143.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1878/files/38963740351.pdf
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/definicion_de_alimentacion_y_nutricion.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050fc.bin
45d062cdf313a15fe9a7d1d1c174bcb8c9d1952a4afb97196053cedc9a51e521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50FC 28180 bytes
font_01_sfnt_off0000a97d.bin
09f6d731c9b163dd796ee6254dc57e6b487fcce444fcd56ca02017733cdd50ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA97D 5224 bytes
font_02_sfnt_off0000bb55.bin
6ea7173dbbc04d021109da2765476f7424eb656ecdd1bc4201dcbdb48624b495		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB55 9884 bytes

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