PDF malware analysis — malicious · 6b5d0f63919abf01

MALICIOUS

PDF

112.1 KB Created: 2021-05-07 21:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: cd3ec63427725db97093ef96dd8d27f1 SHA-1: bc88b81616a3cfc9be62404645cbaf53f71a0859 SHA-256: 6b5d0f63919abf019d0118e0cd350b321cf1e69c7011d9346f2af83cc30621e9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a large number of external links, many of which are likely part of a link farm. One prominent external URI, 'https://ponafet.ru/strik?utm_term=hush+little+baby+lullaby+instrumental', is flagged as suspicious. Although no scripts were extracted, the PDF structure and the presence of numerous external links suggest an attempt to direct users to malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://ponafet.ru/strik?utm_term=hush+little+baby+lullaby+instrumental PDF link annotation
- https://tejenopaje.weebly.com/uploads/1/3/1/1/131164027/1635512.pdfIn PDF document text
- http://fusafanomogade.iblogger.org/76117594692.pdfIn PDF document text
- https://tuvopezape.weebly.com/uploads/1/3/4/7/134712323/1185886bcd25a0.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/bisiku/cuisinart_ice-30_instructions.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/904aa34a-14e5-4a73-8447-7bd78a056d2d/what_is_little_red_riding_hood_name_in_once_upon_a_time.pdfIn PDF document text
- https://s3.amazonaws.com/fizup/reeds_nautical_almanac_2018.pdfIn PDF document text
- https://s3.amazonaws.com/dosalapasenow/how_to_test_covid_vaccine_effectiveness.pdfIn PDF document text
- https://s3.amazonaws.com/jevopemosod/baccho_ki_kahaniya.pdfIn PDF document text
- https://s3.amazonaws.com/tesotiwapax/33047147956.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0d43b891-28bb-4b5a-96ee-d917a85531e1/free_download_english_grammar_correction_software.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0325f1cb-04d9-4aac-b295-ba37e9579bcd/how_to_lose_weight_quick_diet_plan.pdfIn PDF document text
- https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_9ea0ce1c00f048e0b570cc6f1d24139b.pdf?index=trueIn PDF document text
- https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_ceb4eb647f0a453a9997e758f11a3fde.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jedaxopopuko/gabutexodakufawapeza.pdfIn PDF document text
- http://madukavinoxonal.epizy.com/tsunami_2004_movie.pdfIn PDF document text
- https://s3.amazonaws.com/vavejijitatofu/bizasixozupitip.pdfIn PDF document text
- http://xeliposemufara.rf.gd/97335772095.pdfIn PDF document text
- https://s3.amazonaws.com/wupiwupiwot/wumajoraxuzaxalavasef.pdfIn PDF document text
- https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_2c03ff8ad6684c0ca28bbc0f92cd77ed.pdf?index=trueIn PDF document text
- https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_f76bceded617497a93c4c1ae4260c44b.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00014f3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14F3B	3248 bytes
SHA-256: `e35a90f758a4b57700aff2682c94d98ef9ed0f506ea3c6e26c8c9560b9da124f`
`font_01_sfnt_off00015ae1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15AE1	5128 bytes
SHA-256: `5456fa9e180d5c21a182a6c6a4fcc51cc650c4645759a3090b6258020efd9b2c`
`font_02_sfnt_off00016c2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16C2B	15404 bytes
SHA-256: `5f400dc8d5b3cb879ca6e18895be700f772c847671d0a0541bbbbd533a8ef612`
`font_03_sfnt_off00019a05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19A05	16780 bytes
SHA-256: `dae6f1d0bb12a23a8daf7fffb2e38d34a3c4572ed3540be9a7f650ec19c7cdc5`

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