PDF malware analysis — malicious · 541572a1a5d2dad6

MALICIOUS

PDF

101.6 KB Created: 2021-02-10 19:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 8c40a65789594fe5adf3833e6f80c174 SHA-1: 404df7095ab536b33ee1cd63aab6614ec6fc5008 SHA-256: 541572a1a5d2dad6b5c0865056cc496fce05c9217cd79c734bf81b28e2f71175

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One of the primary external links, https://baarspo.ru/aws?utm_term=girlfriend+sad+shayari+image+ing, is suspicious and likely serves as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://baarspo.ru/aws?utm_term=girlfriend+sad+shayari+image+ing PDF link annotation
- https://cdn-cms.f-static.net/uploads/4486368/normal_6019c6a5283ee.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417644/normal_5fde77dbe0f65.pdfIn PDF document text
- http://bettermoneytips.com/badass_alter_ego_names_female82vte.pdfIn PDF document text
- http://familyit.pro/lambda_school_precourse_answerszh3r7.pdfIn PDF document text
- https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/ed7e9f415aa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4427828/normal_5ff58bc70a80e.pdfIn PDF document text
- https://cdn.sqhk.co/rubuxupab/jjjajge/zombie_castaways_mod_2020.pdfIn PDF document text
- https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/0320e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374518/normal_5feb2383e4073.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383804/normal_5fea2bb07373e.pdfIn PDF document text
- https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/sibimo-danedib-zagitevazozeke-jonuvuvit.pdfIn PDF document text
- http://robinmani.site/wadezelmimy1.pdfIn PDF document text
- http://soldonlakewood.com/jokanuzepapkbhb.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://s3.amazonaws.com/ponivotigegepub/set_background_gradient_android.pdfIn PDF document text
- https://s3.amazonaws.com/jidosatikim/kenny_g_going_home_sheet_music.pdfIn PDF document text
- https://s3.amazonaws.com/polojuliragam/79371294568.pdfIn PDF document text
- https://s3.amazonaws.com/rewepalazamiso/winanas.pdfIn PDF document text
- https://s3.amazonaws.com/kewuxejikiwe/firefox_47_version.pdfIn PDF document text
- https://s3.amazonaws.com/suxuzubojut/54928177049.pdfIn PDF document text
- https://s3.amazonaws.com/fedure/selenium_testing_interview_questions_and_answers.pdfIn PDF document text
- https://s3.amazonaws.com/vedexajawo/battlefield_1_full_version_pc.pdfIn PDF document text
- https://s3.amazonaws.com/nowonovege/82546874103.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://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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010ce1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CE1	5456 bytes
SHA-256: `98a297362c2809f9fcc4e60aa60bc739166f8c80aa01fcf12a48a27e01d6163e`
`font_01_sfnt_off00011f46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F46	5768 bytes
SHA-256: `80fb5def835d27a82af2f3c4fe0deede466ff494eab936582a400313dc23fa04`
`font_02_sfnt_off000132cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132CF	10352 bytes
SHA-256: `ecdb6e67a85f8590689fb941d68a57d4710897bfb8c721c280e0951f492c52f4`
`font_03_sfnt_off00015651.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15651	18740 bytes
SHA-256: `85b8acbe3b7b1621fe235b7ad1a65bcf0dc4386c208eee44f474c412e1118f5a`
`font_04_sfnt_off0001705b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1705B	6016 bytes
SHA-256: `8e198524f1ca9438efa1d9b29c2ece36f5adedcdad0515c623d5d425219bc35e`

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