Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c96214258b1941…

MALICIOUS

PDF

83.3 KB Created: 2021-05-08 16:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3ca6df67ea2878fc56790e67e9642c1d SHA-1: ee7cbc0ed99ea58027bee8796d7235fda4d4e639 SHA-256: 86c96214258b194160907b3e25bcd93a58fea7406f0aebb008aa97004f34a0f0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary external URL, https://jacksth.ru/strik?utm_term=learning+arabic+language+of+the+quran+izzath+uroosa, is likely part of this campaign. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://jacksth.ru/strik?utm_term=learning+arabic+language+of+the+quran+izzath+uroosa PDF link annotation
    • https://bafuselowazela.weebly.com/uploads/1/3/5/3/135318440/23410135c85584a.pdfIn PDF document text
    • https://xulijijexam.weebly.com/uploads/1/3/1/4/131453336/6146738.pdfIn PDF document text
    • http://zuwitirub.iblogger.org/35877123033.pdfIn PDF document text
    • https://fijuvosezo.weebly.com/uploads/1/3/4/0/134096395/e520064427c.pdfIn PDF document text
    • http://alphabitx.com/378915606911i1tk.pdfIn PDF document text
    • https://jomaredavox.weebly.com/uploads/1/3/2/3/132302995/vekefusasititokezi.pdfIn PDF document text
    • https://sowofofum.weebly.com/uploads/1/3/2/8/132814146/vupevenibixedax-xuzukiwewuf-wolevo-xoxixope.pdfIn PDF document text
    • http://lg-supportteam.com/top_100_law_of_attraction_quotes_from_the_secret_part_2tkhjp.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/dbc9da72701d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63995da9-74be-4895-8497-a4fa53c9845d.filesusr.com/ugd/788c84_a5573998edf5467e9084d39114b65314.pdf?index=trueIn PDF document text
    • http://tagugatukosag.epizy.com/55467190706.pdfIn PDF document text
    • http://mibelajute.epizy.com/aliens_vs_predator_2_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/delonghi_ew7507eb_review.pdfIn PDF document text
    • http://xigufogadenake.epizy.com/jenibofebinowififu.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_cb5b8cedda3c4076abe50bc534fd687c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gosete/punjabi_couple_dance_performance.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011af5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11AF5 20300 bytes
SHA-256: 20e862a9d9a46d3196f6a5ae2d90015a83d1429c5b6abf31c681b9f9854641d4
font_00_sfnt_off0000cf69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF69 5400 bytes
SHA-256: ba4562fd60bcb650e1b51e362d1d13cc6dbade05c256012b48a12845bf1e58a4
font_01_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 6232 bytes
SHA-256: e046672bfaf0c3b6b22076a4cdfe85e7671cdf5449507c5629ba179bb34d30cc
font_02_sfnt_off0000f5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 11060 bytes
SHA-256: 51701f80d45f54eb07f41ba95f3212d216ecbefbfbd3d979870a69b85c7040e7