Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30586b7fb91bdbe…

MALICIOUS

PDF

77.8 KB Created: 2021-06-21 07:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f469bebd5731b9e61092c4581c74372c SHA-1: 314a66996446db185eca94d90399bda4216674fe SHA-256: e30586b7fb91bdbec955a9cf6b7cb3a89779c316d148aa87515ce56540980686
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and disposable hosting, likely to obscure the ultimate destination and evade detection. The presence of embedded URLs and the nature of the heuristics suggest it is designed to lure users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/3b361509f100aea3d02b225825088239/tusebowazixevekidikep.pdf
    • http://alarmy-kamery24.pl/userfiles/file/15406040705.pdf
    • https://travelstore.tn/userfiles/file/welulunele.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/062mon3t0m3nmckcnapvl5naj0/53875921541.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/2a2t1vpdkeaf8e6gjku3kr62ct/27943268849.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/b4bedeb485aca26497f1242410bc0510/93416015548.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076618d62ffe---fapuzigomisikijuz.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/e2fe5773cefa6c537a589ae82bd3f72a/gemevoxejiba.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa90b1a3803---63556487036.pdf
    • https://codecs.roimages/file/17134859973.pdf
    • http://birnagarcollege.in/userfiles/file/97464123870.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/0bdc42e4498883df4bb5aad77523ed49/garetuxofurulaxuf.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/460cc8d9b4eb9f205eb496d351403828/mikape.pdf
    • http://kodcomputers.ro/2664/uploads/wasodubasotukaruvenegite.pdf
    • http://czpohledavky.cz/userfiles/files/19450139507.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4184b2ce5---18806687548.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083553fbfbf7---sakexemogurijununazip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.indictrans.org
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=dj+mera+bhola+hai+bhandari
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c769.bin
cd865d79a56a9e5b5ed561e3e9d2f1ddf619103083fc029ec1ab5548a79634c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC769 5104 bytes
font_01_sfnt_off0000d891.bin
f51f9453fd5a2dbf3f568c08b7ae0f6185c945338f9f6fb06324bc2b80d165d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD891 5292 bytes
font_02_sfnt_off0000e9b0.bin
a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 2140 bytes
font_03_sfnt_off0000f388.bin
33faabc464826235af7d4ee605d5de8450a3432aedf7f3e6afb4001b25bf979c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF388 11200 bytes
font_04_sfnt_off000119fd.bin
dfda8c6a8e1ca623cf5a3a378f9ca0247612e7ded2b428d095fc1d2afdebfae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 3420 bytes