Malicious PDF — malware analysis report

Static analysis result for SHA-256 da237fb78d2e141e…

MALICIOUS

PDF

99.4 KB Created: 2021-03-15 21:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 707493c8ce01bd13b70a8653ea5c81ea SHA-1: 2a2c6c550ab0a8bb74ef6e12ff2f88f7304b81a0 SHA-256: da237fb78d2e141e31774ae16f2954c605a705620d9514ac8a95d96beb034da5
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a prominent one leading to 'fokemale.ru'. This domain, along with others identified as link farms on disposable hosting, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the redirection of users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

Heuristics 5

  • 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 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://fokemale.ru/strik?utm_term=moto+g+third+generation+price+in+pakistan PDF link annotation
    • http://rotosararazazi.22web.org/the_stand_1994_miniseries_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/gjmoQii/88193324348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419194/normal_603f9cdda2633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_60146d6cb0cc6.pdfIn PDF document text
    • http://dusakopu.iblogger.org/jaxuto.pdfIn PDF document text
    • http://spoonnumberone.xyz/the_sum_of_all_interior_angles_of_a_convex_polygon_of_n_sides_isqggum.pdfIn PDF document text
    • https://cdn.sqhk.co/tejusukaxajo/cfJdjjx/hitman_2_gold_edition_xbox_one_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460233/normal_5fc60f4ab2201.pdfIn PDF document text
    • https://cdn.sqhk.co/zimalodepafo/g0ogjg2/wash_your_hands_dance_with_baby_shark_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/anialht/my_stella_knights_voice_actors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_601bd0efb87c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_60461ff2d5fdf.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/cjbjhia/89558856763.pdfIn PDF document text
    • http://ruxipivufaditij.22web.org/4668555591.pdfIn PDF document text
    • http://subonus.ru/robimederupulelenusomn22g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bopexetosezulav.rf.gd/challenge_full_movie_bengali.pdfIn PDF document text
    • http://bonufew.epizy.com/42688857320.pdfIn PDF document text
    • http://dotalikajulu.rf.gd/tozimuwotoxapemukiwe.pdfIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_6fad70b748894b5fa4c4eb1b8e8f3a10.pdf?index=trueIn PDF document text
    • https://38c8c62e-1823-4c1e-8220-bc61efcc8a1c.filesusr.com/ugd/c24b9b_0c507cda62824611a48b19cc6f239c70.pdf?index=trueIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_2d7c483d992244579e27f2258db32aad.pdf?index=trueIn PDF document text
    • http://zaxukesaludu.epizy.com/79221330187.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 5160 bytes
SHA-256: bf4d3048d52eddecada017d243902870aefecffbe679db9e533b42241053a5e7
font_01_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 2196 bytes
SHA-256: a5067b6b273d805be0a2cb16434a380324c83a7396b9aad2763f2bcd44f3bd35
font_02_sfnt_off00010c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C47 3852 bytes
SHA-256: fb9a9d6d956734aafa617145bc4294d680f35380ebfe4cccb0c41768ced05ec5
font_03_sfnt_off00011806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11806 2800 bytes
SHA-256: fd2c589d7f1fdc6b45908b7e6090fac7e9d49628e1ec9941768bd75dc132fb9d
font_04_sfnt_off000122b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B7 12596 bytes
SHA-256: d885be53f8988974253c904796efdbee682b87c1cd7571b42e14cf9fbc412214
font_05_sfnt_off00014d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D3A 16912 bytes
SHA-256: ef34d016c4ef9b170588d880f2b63f38adfae74d5f808537b1ab62cecc7276f9
font_06_sfnt_off0001656a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1656A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
font_07_sfnt_off00017369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17369 2416 bytes
SHA-256: 606572454e85aeb57f6656cf48871ed3cc3cba181eae4edc1c6e97d9fefe09d3

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