PDF malware analysis — malicious · 63d770ccbcee59fd

MALICIOUS

PDF

75.4 KB Created: 2021-09-23 20:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: bc125990f8ec453e2ba069d75272b9e7 SHA-1: 494121706eba87593381703a7eb8c8f37df463b0 SHA-256: 63d770ccbcee59fdf3ff0b7827c8091a251d8541f16c714841e78c45a3abeacd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI indicators and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://infrive.ru/uplcv?utm_term=indian+tv+channel+app+for+android PDF link annotation
- https://losungversorger.com/product/file/26839662810.pdfIn PDF document text
- http://studiofelician.com/userfiles/files/dejodunitizasogepofixip.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4783a1359---78283200187.pdfIn PDF document text
- http://hunting.kg/userfiles/file/moroxizapelorinekoniw.pdfIn PDF document text
- http://tz5168.com/uploadfile/image/2021/09/03/file/20210903_121114_127.pdfIn PDF document text
- http://pobierzplik.pl/uploads/files/66368314608.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612feff835b4d---25721820260.pdfIn PDF document text
- http://albino-pitti.com/pub_img/file/fibaliwarizelirejor.pdfIn PDF document text
- http://ls12368.com/userfiles/file/poxodelovopefomose.pdfIn PDF document text
- http://life-worldwide.org/assets/uploads/files/gerudobigesobubaf.pdfIn PDF document text
- https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/ljj9gmoghe6hs5p4papcf0l21a/90591577594.pdfIn PDF document text
- http://hacoauto.vn/upload/files/sagisosavijutotexirezuwa.pdfIn PDF document text
- http://ukrainski-rosyjski.pl/userfiles/file/29373419507.pdfIn PDF document text
- http://amidoux-peintures.com/ckfinder/userfiles/files/64591604113.pdfIn PDF document text
- https://billionbosses.com/ckfinder/userfiles/files/43342825519.pdfIn PDF document text
- http://dakov.hu/_user/file/9760544608.pdfIn PDF document text
- http://managhantasala.net/mailuserfiles/file/bonufadixagavoletigese.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/it2k3uef5lglq2sb2f2es0cqch/77777310178.pdfIn PDF document text
- https://tommytest.dish1314.com/data/html_editor/files/jigokifafameninor.pdfIn PDF document text
- https://stancijanegrin.com/userfiles/file/57805620594.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5k878hmueud69oel3krlipndoa/powelol.pdfIn PDF document text
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613df6c68d116---jowitikumapafetexuwu.pdfIn PDF document text
- http://razzledazzleevents.in/userfiles/file/52246264779.pdfIn PDF document text
- https://www.thc.gda.pl/ckfinder/userfiles/files/61519812237.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c55d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC55D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dd6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD6F	16452 bytes
SHA-256: `f83b46fcc5ba10eab460825a5e4bec4e90f0f3530e668114f46259a23c0e8835`
`font_02_sfnt_off000107d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107D0	10564 bytes
SHA-256: `011dfa39ab4248300a767b06aef9c8894304793e962b7076815f0bbbcd05d243`

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