PDF malware analysis — malicious · 7a2ee56243f4d73b

MALICIOUS

PDF

74.3 KB Created: 2021-09-03 13:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 4996d1ec222a02275d4179c428594797 SHA-1: a97ba6876375f281c3f3f674a7007b10f4b09512 SHA-256: 7a2ee56243f4d73b436c5737a146e6c77e6313334e5d9d9be2c2a6143e52320f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites, as indicated by heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

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 http://bestpokeya.com/uploads/files/61921667022.pdf In PDF document text
- http://prunay-en-yvelines.fr/ckfinder/userfiles/files/xufija.pdfIn PDF document text
- https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/159977c475ed112c6396ac9860a179c8/78693996528.pdfIn PDF document text
- https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098709461353---nebuvumomotukeji.pdfIn PDF document text
- https://imotrading.com/images/userfiles/rexuj.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a618fb2b042---63454958476.pdfIn PDF document text
- https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/45025efb2ef59d6481164c8917f4e586/rawukutidas.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c34ce8077a---33798211493.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16120c34e92931---lalirun.pdfIn PDF document text
- http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/69404184042.pdfIn PDF document text
- https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954094c9313---16040602608.pdfIn PDF document text
- http://bsp-oblspl.org/ckfinder/userfiles/files/gagovajaburapezox.pdfIn PDF document text
- http://cutskytools.com/d/files/72504541343.pdfIn PDF document text
- https://vicotelecom.vn/static/source/images/file/36655991153.pdfIn PDF document text
- https://misbahelmudii.org/ckfinder/userfiles/files/jofejurajarivigubixigu.pdfIn PDF document text
- http://cartopack.be/Images/file/jetopusipaxefam.pdfIn PDF document text
- https://p99.tw/pro_pic/files/xejuwi.pdfIn PDF document text
- https://papiratisk.cz/soubory/zonibalomufugedesuko.pdfIn PDF document text
- http://4bx.pl/public/file/2534631752.pdfIn PDF document text
- http://pobierzplik.pl/uploads/files/65150221041.pdfIn PDF document text
- https://goodline.by/userfiles/file/13511221009.pdfIn PDF document text
- https://btcauction.vn/hinhanh/file/2641163436.pdfIn PDF document text
- https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/kulewibeburirebajur.pdfIn PDF document text
- https://diedacorporation.net/freesiafiles/file/81018940831.pdfIn PDF document text
- https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f5bea7b01---pilunef.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=single+axis+solar+tracking+system+pdfPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bea5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBEA5	11344 bytes
SHA-256: `063ac446613bd7bdbb9344c7b0ef3ba43eb87e6af20c772bb8ee5f6add16a472`
`font_01_sfnt_off0000d92a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD92A	16552 bytes
SHA-256: `5b0797002adc0137392f6385f094df6579d4ebb4de95e67333ad02c6075cc03a`
`font_02_sfnt_off0001034e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1034E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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