Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3bd162637be5f3…

MALICIOUS

PDF

79.9 KB Created: 2021-03-15 17:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e49b711d1b7354ae19466127c6bca924 SHA-1: e2d5c5d655aac16222d71de9eb241af6d35b4a35 SHA-256: cc3bd162637be5f3b0a6a4b222f8ff988a79a7927d94e58342f586b715703b8a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, which flagged it as a phishing trojan. The document contains a large number of external links, many of which are on disposable hosting and use UTM parameters, indicating a link farm or SEO spam tactic. The primary URL observed is https://botokaw.ru/aws?utm_term=el+nombre+de+la+rosa+pelicula+online, suggesting a lure related to a movie.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/aws?utm_term=el+nombre+de+la+rosa+pelicula+online
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/4d68499355cbdd4.pdf
    • http://rating-bookmaker.ru/bogizegoipty.pdf
    • https://xorexataziz.weebly.com/uploads/1/3/4/4/134496469/jiwunisuposodu.pdf
    • http://reactivaperu-2020.com/what_do_the_seventh_day_adventist_believe_about_hellx1yb9.pdf
    • http://creditscorecard.info/maze_runner_2nd_bookgyvtw.pdf
    • http://littlenat.space/sources_of_the_making_of_the_west_volume_i_to_1750_peoples_and_cultureslhan1.pdf
    • https://tiwozujipi.weebly.com/uploads/1/3/5/3/135317022/721055.pdf
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/nipolizo.pdf
    • https://puramekekekiz.weebly.com/uploads/1/3/4/6/134648744/wekabo.pdf
    • http://kmplitka.shop/martha_and_hanwell_reviewjbv7f.pdf
    • http://salonly.xyz/behringer_xenyx_1202fx_dimensionsyp7nq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4612c408-2ecc-4f37-ad07-e042f7312402/gazelle_freestyle_elite.pdf
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_10b698945d8a4196a54415832766b4b2.pdf?index=true
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_50872f1b14c64a54ad67763232a058ae.pdf?index=true
    • https://d0fd22f1-78bd-4368-960d-2a324028b2bb.filesusr.com/ugd/a4d998_11be25fbf45e49febc2a4e864b18e843.pdf?index=true
    • http://puredaw.rf.gd/what_is_price_of_samsung_galaxy_grand_prime.pdf
    • https://uploads.strikinglycdn.com/files/3ffdf3b0-04a2-41fc-a9a3-a2a79bf3392e/equivalent_fractions_worksheet_year_3.pdf
    • http://lebubenopi.rf.gd/google_android_one_wallpaper.pdf
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_35846a2f419b45daa2248e0ec8f6d3da.pdf?index=true
    • http://megeloxukix.epizy.com/summer_and_winter_air_conditioning_system.pdf
    • https://uploads.strikinglycdn.com/files/c44784a2-34de-4577-ab00-f9787abc9d46/plan_de_negocio_enrique_zorita_lloreda_gratis.pdf
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_b55b18f78ee54da6b7cd17e9996ae279.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef36.bin
12cdd47e7ced1a1a43c0847e3f81c4342480c57b915f022251a926dd7cee9b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 5316 bytes
font_01_sfnt_off00010124.bin
498a5f0fb7ee838fed45f668a731f9af776f4fcbd7be7b419fb2adf422fa1938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10124 16532 bytes

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