PDF malware analysis — malicious · 4306b484b4dda601

MALICIOUS

PDF

93.2 KB Created: 2021-09-07 00:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 42e231acf8ab769e77ccfdba08cdef49 SHA-1: f2dd015b9508ea2566c3586674086fbc0b27d5c3 SHA-256: 4306b484b4dda6015d1dc74ba9924486e609c8a7adc05611fedfaea69f128e8b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised or disposable hosting sites, indicating an attempt to redirect users to malicious content. The presence of numerous external URIs and a link farm heuristic strongly suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9629

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
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://pathakpharma.in/singhania/downloads/file/dimuxefelikukafuzuxibeda.pdf In PDF document text
- https://threadworx.com/thread/admin/uploads/file/72062263562.pdfIn PDF document text
- https://ctsgroups.asia/images/file/lutuxezovumumewubid.pdfIn PDF document text
- http://kayapaliinsaat.net/file/88198319535.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16123a03b7f036---27408944963.pdfIn PDF document text
- http://revize-elektro.info/UserFiles/File/14440762042.pdfIn PDF document text
- https://eghamatkade.com/basefile/eghamatkadecom/files/fibodetusunosiwokunilowej.pdfIn PDF document text
- http://integrotech.com/zdjecia/file/21404138854.pdfIn PDF document text
- http://scoopsites.net/userfiles/file/20079072004.pdfIn PDF document text
- http://www.aadhar-interior.com/userfiles/file/37810554685.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/7utjnga1a27fpj9bm4k56i4255/19764924031.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd9f942775---2895091425.pdfIn PDF document text
- https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/601a667bd7550100ebbe5fe4e9df1c63/35163129549.pdfIn PDF document text
- http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079dd08211e8---6819748885.pdfIn PDF document text
- http://jshtextile.com/UserFiles/file///vulofigitepuviboxomipo.pdfIn PDF document text
- https://ntiverification.com/userfiles/file/7736022285.pdfIn PDF document text
- https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/1utsentblhh2mh4d2m38qnjvb2/fekikemelaraf.pdfIn PDF document text
- http://nena-artspace.com/ckfinder/userfiles/files/dorufivutufirajedox.pdfIn PDF document text
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611a0df884c61---46371052637.pdfIn PDF document text
- https://aimhc.com/userfiles/file/14215155324.pdfIn PDF document text
- http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6e70312cf---faxurugixizis.pdfIn PDF document text
- http://dietetyka-24.pl/images/files/kabomurabifopijerumudo.pdfIn PDF document text
- http://capital96.com/userfiles/file/40279822354.pdfIn PDF document text
- https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/f6c3fdb11c2ab6b776ba5b63afa94e60/rujetatuvugevajejizukano.pdfIn PDF document text
- https://pima-alarms.eu/slicice/file/pamatafewo.pdfIn PDF document text
- http://churchtextile.com/userfiles/file/gugazemebutukemenu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=cooler+master+sk621+manualPDF link annotation
- 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://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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d417.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD417	25300 bytes
SHA-256: `19c4688495e81203e709fec21dac368ec433a592bcee71f11e5704fd3d68568c`
`font_01_sfnt_off000112c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112C2	10740 bytes
SHA-256: `96da8adf730ff79e98eccd2cf540df38483f9626233832ddf29339eb8b6661e7`
`font_02_sfnt_off00012ba4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BA4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off000143b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143B5	16532 bytes
SHA-256: `b22a33603e7f720256bccb0e88716833e2da219baf79044379fe17fd01f9f882`
`font_04_sfnt_off00015ae2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15AE2	2076 bytes
SHA-256: `1f799b7ff30558cb797733d0d863c6226dc4eb0c112cd2fbd9ecd7b64b66777f`

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