Malicious PDF — malware analysis report

Static analysis result for SHA-256 48045a9d9f96ef43…

MALICIOUS

PDF

81.3 KB Created: 2021-03-06 06:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 79f150140e1a4871fb0f4b0ff20b0a62 SHA-1: ac84d3d4375932e2fa3ffc1063305265ea09f9f9 SHA-256: 48045a9d9f96ef431ef6d7840d153a469f0f977cacb202369fb858311f1b262e
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and external links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • 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 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://midufefew.ru/wix?keyword=bdo+tarif+smuggler+location PDF link annotation
    • http://trickyturkey.com/steam_link_android_ps4_controller7on56.pdfIn PDF document text
    • http://stankoff.org/84572768974z6dfd.pdfIn PDF document text
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/gidamukefukibafamu.pdfIn PDF document text
    • http://albatros-trans.ru/wolusimeduzawotedorvzd0b.pdfIn PDF document text
    • http://pumba.fun/if_smart_company_issues_1_000_shares_of_5_par_value_common_stock_for_90_000_the_account37mq7.pdfIn PDF document text
    • http://mnogoturov.com/wic_reset_utility_key_free_canonsir1d.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/xusogemuniw.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/richmond_tankless_water_heater_service_manualtzmni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_f7ced9bc20744cf8b68d063d3577d20b.pdf?index=trueIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_83cdf9d896c444d28b6d3726ae050d2e.pdf?index=trueIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_251e4b86ba84471994ab3e0a8c5ef5da.pdf?index=trueIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_1414c19fb2994d3ea69eab32c0850010.pdf?index=trueIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_95a2a87d536b448f85491fc55578d250.pdf?index=trueIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_dfc0761eb14d45afa3c308c5a9ccab26.pdf?index=trueIn PDF document text
    • https://836291d8-7b77-40db-be8c-3105928c7ef3.filesusr.com/ugd/aae074_a4a4c26acf8b4c3e85115af4d282771c.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_ec07a0d911ff4cf791a3522e656672f9.pdf?index=trueIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_65f55feed3f947b191674f5962fc9f6f.pdf?index=trueIn PDF document text
    • http://netawakobal.rf.gd/toro_corded_electric_string_trimmer.pdfIn PDF document text
    • http://lejonawazemu.rf.gd/neramawanineneperaxe.pdfIn PDF document text
    • http://dogibuboka.rf.gd/17274545858.pdfIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_5dffc9aa8fa744b99883e47e828e4569.pdf?index=trueIn PDF document text
    • http://guruzukatukeged.epizy.com/wuxifem.pdfIn PDF document text
    • http://magetamuwunaze.rf.gd/61606396024.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30B 5272 bytes
SHA-256: ab59409c05b25bc0888d6c8e9de4d2423a98f70840cb7b8dd07b5157984e37c4
font_01_sfnt_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 2092 bytes
SHA-256: 6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5
font_02_sfnt_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 11016 bytes
SHA-256: f9db38db23ceca29cb97c1467dd4ce28a4450e957656059c635fcc025d9a38ae
font_03_sfnt_off0001144e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144E 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb
font_04_sfnt_off000128b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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