Malicious PDF — malware analysis report

Static analysis result for SHA-256 082b0855d1380bba…

MALICIOUS

PDF

89.3 KB Created: 2021-05-16 08:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47b141a233d604e3aaf4da4650dba677 SHA-1: 9b09e6259eafba5ffca1b3499a56e889568417f4 SHA-256: 082b0855d1380bbad28a6f406e9606b6d52cac28efd0a48f99e72e1866d618d4
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely 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 http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ardpv3c2fstd3e55426rsksa80/lobazufagozozewu.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b0546eb23b3fff033da9348c8d99d184/vopirowesupudixafidow.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ejvt6j7rb0nn4i9dmc4u1lu481/14892419667.pdf
    • https://aspaeng.com/files/image/files/wenebik.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/dvq5e36vma59htk6pmq4peqdg2/13636102994.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/84418b14ca56dc5be1e22b90c38e9ea6/xajoxedoko.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/61af88a16c6cca43b65ec2fd5a878ee8/49144392790.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7c5ce070dd251aa177b8cd7ee73eca24/dizakobadedobu.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9f07c57343a74ede4b4137f4029e3c04/48454086386.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1967ec970---fijugadevajurewomo.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a070ebcba40---74690533228.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e51bd4a45f---62755035712.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5646922a8---14958376215.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca61e9976c---53427167642.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf8410ccf---5186513540.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/hu1esvtmp8865dq53sh0d7pta8/40060423683.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/jijupadogorotijeze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=common+general+knowledge+questions+and+answers+uk
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110c7.bin
aed0386bfdc694201da3261458c3aaf342d26bb54c2a935e3d40af67f81533db
pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 5332 bytes
font_01_sfnt_off000122d8.bin
d89a7ad49bb3838368b8e5094a0a4a237aaf129103599986cb2203d7187839ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x122D8 11840 bytes
font_02_sfnt_off00014962.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14962 4324 bytes